Thursday

October 23, 2014

October 23, 2014

Number of results: 1,315

**electrical ? resistor**

Calculate R of a thin-film gold resistor:L = 1 mm, width = 0.2 mm, and thickness = 0.01 mm. I am not sure what formula to use for this?
*July 26, 2010 by sam*

**physics**

A resistor with 780 is connected to the plates of a charged capacitor with capacitance 4.32 . Just before the connection is made, the charge on the capacitor is 7.80 1)What is the energy initially stored in the capacitor? 2)What is the electrical power dissipated in the ...
*April 22, 2013 by samya*

**Phys**

The value of a real-world resistor ______ changes with significant time as the resistor conducts a current. never rarely sometimes usually I think either never or rarely, but I'm not sure. When you unplug the resistor, the Ammeter and Voltmeter reading goes down to 0 because ...
*February 9, 2011 by Jennifer*

**PHYSICS**

The value of a real-world resistor ______ changes with significant time as the resistor conducts a current. never rarely sometimes usually I think either never or rarely, but I'm not sure. When you unplug the resistor, the Ammeter and Voltmeter reading goes down to 0 because ...
*February 9, 2011 by Jennifer*

**PreCalc**

The total electrical resistance R of two resistors connected in parallel with resistances R1 and R2 is given by 1/R=1/R1+1/R2. One resistor has a resistance of 2.3 ohms. Let x be the resistance of the second resistor. Express the total resistance R as a function of x. How do I...
*December 1, 2010 by Linda*

**Pre-Calc**

Hello, I am not sure how to go about solving this equation: The total electrical resistance R of two resistors connected in parallel with resistances R1 and R2 is given by 1/R=1/R1+1/R2. One resistor has a resistance of 2.3 ohms. Let x be the resistance of the second resistor...
*December 6, 2009 by Jon*

**physics **

An oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat energy. If the light bulb converts 75% of the electrical energy to thermal energy, and the oven is used for a ...
*May 30, 2013 by maddy*

**physics**

A 15.0 resistor and a 20.0 resistor are connected in parallel. A 5.00 resistor is connected across a 1.00 10^2-V battery. What is the current flowing through the 20.0 resistor? A. 1.21 A B. 3.15 A C. 5.00 A D. 6.84 A I don't think it's C....
*April 7, 2009 by sophie*

**Physics**

A commercial resistor can safely dissipate power only up to a certain rated value. Beyond this value, the resistor becomes excessively hot and often cracks apart. The resistor used in this experiment was rated by the manufacturer to be a 2 watt resistor. What is the largest ...
*February 23, 2010 by San*

**Physics**

A filament bulb and a resistor are connected in series to a battery. Which of the following will contribute to the load of the circuit? A. Bulb B. resistor C. Bulb and resistor D. none I'm thinking the resistor, but I'm unsure. Thanks
*January 23, 2013 by Need some help*

**Physics**

A filament bulb and a resistor are connected in series to a battery. Which of the following will contribute to the load of the circuit? A. Bulb B. resistor C. Bulb and resistor D. none I'm thinking the resistor, but I'm unsure. Thanks
*January 24, 2013 by Need some help*

**Physics (Tricky)**

If the length of a conductor is doubled, the resistance will be ___ the original resistance. A. less than - i think its A? B. equal to C. half D. twice A resistor most suited to dissipating high power levels would be: A. Thick film resistor - i think it's A? B. Wire wound ...
*June 10, 2013 by John*

**math**

90 volts are applied to a circut with 3 resistors resistor 1=20 ohms resistor 2=40 ohms and resistor 3=60 ohms how much power will be dissipated by resistor 1
*September 19, 2012 by chad*

**College Physics**

A simple circuit is made of a power source, a rheostat and an ohmic resistor. The potential difference across the resistor is initially 5.0 ± 0.1 V. A good lab student measures the current across the resistor to be 1.65 ± 5 mA. a)If the student increases the voltage across the...
*February 10, 2009 by Jas*

**Physics**

Could someone please help me with these questions. . . 1. Why are there positive and negative electrical charges, while magnetic poles always seem to be bound together? 2.If two resistors are connected in parallel, how do you know that their effective resistance will always be...
*December 3, 2007 by Adam*

**physics**

The Easy Bake Oven is a common toy for young children who want to emulate the process of cooking. Suppose this oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat ...
*May 30, 2013 by Julia*

**physics**

A 6.0 Ù resistor and a 3.0 Ù resistor are connected in parallel to a 1.5 V battery of negligible internal resistance. What is the current in the 3.0 Ù resistor?
*March 6, 2014 by Lucy*

**physics**

A resistor is connected across the terminals of a 6.00-V battery, which delivers 3.50 105 J of energy to the resistor in 11 hours. What is the resistance of the resistor?
*January 19, 2011 by Anonymous*

**science**

laboratory connects a 16§Ù resistor, 23§Ù resistor, and a 34§Ù resistor in series and then comes the arrangement to a 36V dc source. How much current is in the circuit?
*December 17, 2011 by alex*

**Physics**

A 15.0 kΩ resistor is hooked up to a 45.0 V battery in a circuit with a switch. a.) What is the current flowing through the resistor? b.) What is the power dissipated by the resistor?
*June 3, 2014 by Me and I*

**Physics**

1)If a resistor is added to a parallel circuit, the equivalent resistance: A)increases B)decreases C)remains the same D)becomes zero I got B 2)A 10.0 resistor, 20.0 resistor, and 25.0 resistor are connected in series across a 110-V supply. Calculate the current in the circuit...
*April 9, 2008 by Jon*

**physics**

please i need help solving this problem, what is the resistance of a resistor if the potential difference across the resistor is 4.0 V when a current of 10.0 A flows through the resistor?
*December 1, 2009 by Paulo*

**physics**

A 9.0 §Ù resistor and a 53.0 §Ù resistor are connected in parallel to a battery, and the current in the 9.0 §Ù resistor is found to be 1.41 A. Find the potential diﬀerence across the bat- tery.
*May 3, 2014 by Anonymous*

**Electrical Engineering**

what is one time constant of a 47 micro farad capacitor in series with a 120 kilo ohm resistor?
*April 3, 2010 by Jay*

**Physics.**

A 15.0- resistor and a 20.0- resistor are connected in parallel. A 5.00- resistor is connected in series with this parallel arrangement. The resistors are connected across a 1.00 10^2-V battery. What is the current flowing through the 20.0- resistor? IS it 3.15 A?
*May 20, 2009 by Amber.*

**physics**

A 65.0-Ù resistor is connected in parallel with a 117.0-Ù resistor. This parallel group is connected in series with a 22.0-Ù resistor. The total combination is connected across a 15.0-V battery Find the current in the 117.0-Ù resistor. Find the power dissipated in the 117.0-Ù ...
*January 29, 2011 by Anonymous*

**Physics**

A simple circuit is made of a power source, a rheostat and an ohmic resistor. The potential difference across the resistor is initially 5.0 +/- 0.1 V. A good lab student measures the current across the resistor to be 1.65 +/- 5 mA. a)If the student increases the voltage across...
*February 10, 2009 by Nina*

**science**

A thermally insulated 50 ohm resistor carries a current of 1 A for 1 s. The initial temperature of the resistor is 10 degree Celsius, its mass is 5 g, its specific heat capacity is 850. What is the change in entropy of the resistor?
*February 1, 2012 by prabhu*

**Math!!**

Christmas lights that stay on when one bulb burns out are wired as parallel circuits. Resistors can be used with parallel electrical circuits to restrict the current flow and produce heat. If the first resistor (R1) = 20 Ohms, the second resistor (R2) = 30 Ohms and the ...
*March 3, 2013 by Urgent math help!!*

**mathematica**

Christmas lights that stay on when one bulb burns out are wired as parallel circuits. Resistors can be used with parallel electrical circuits to restrict the current flow and produce heat. If the first resistor (R1) = 20 Ohms, the second resistor (R2) = 30 Ohms and the ...
*March 3, 2013 by Please Urgent Urgent! math help!!*

**Someone please help me with science? **

1. Which of the following shows the correct sequence of energy transformations when listening to the radio? electrical; kinetic; sound; kinetic; electrical electrical; sound; kinetic; sound; electrical sound; electrical; kinetic; electrical; sound kinetic; sound; electrical; ...
*April 16, 2013 by Rebekah*

**7TH GRADE SCIENCE?!?!**

1. Which of the following shows the correct sequence of energy transformations when listening to the radio? electrical; kinetic; sound; kinetic; electrical electrical; sound; kinetic; sound; electrical sound; electrical; kinetic; electrical; sound kinetic; sound; electrical; ...
*April 16, 2013 by Rebekah*

**physic**

a resistor has a voltage of 6.65 V and a current of 4.45 A. it is placed in a calorimeter containing 200g of water at 24 degree Celsius. the calorimeter is aluminum (specific heat= 0.220 cal/g-Celsius), and its mass is 60g. the heat capacity of the resistor itself is ...
*February 26, 2013 by julie*

**Physics**

A 10.0 Ω resistor is hooked up in series with an 8.0 Ω resistor followed by a 27.0 Ω resistor. The circuit is powered by a 9.0 V battery -Calculate the equivalent resistance. -Calculate the voltage drop across each resistor in the circuit.
*June 2, 2014 by Me and I*

**physics**

The potential differnece across a resistor is 4.4 * 10^2 V. If the resistance of the resistor is 1.8 k ohms, how much current flows throught the resistor? R=1.8 k ohms I=? 4.4*10^2 V V=IR I=V/R = 4.4 * 10^2 ___________ = 2.44*10 1.8 * 10^ 24.4 A is this done correctly?
*March 15, 2009 by physics*

**Physics repost**

A 2.00 resistor, and a 12.0 resistor are connected in parallel across a 20.0-V battery. What is the current flowing through the 2.00 resistor? A)1.67 A B)1.40 A C)11.6 A D)10.0 A This is all I understand. Can you explain step by step and show how to get the answer? To find ...
*April 9, 2008 by Jon*

**Algebra**

Show all steps The maximum number of volts, E, that can be placed across a resistor is given by the formula E=sq root(PR), where P is the number of watts of piwer that the resistor can absorb and R is the resistance of the resistor in ohms. Solve this equation for R. Use the ...
*October 25, 2011 by Betty*

**electrical circuit instrumentation**

two resistor 6 ohm and 8 ohm are connected in parallael across 36v power supply
*June 5, 2014 by shiyan*

**chemistry**

something connects a 16 resistor, 23 resistor, and 34 resistor in series and then connects the arrangement to a 36 v dc source. how much current is in the circuit?
*December 3, 2011 by Tammy*

**physics**

a 1 ohm resistor, a 1000 resistor and a 2000 ohm resistor are connected in parallel. The total resistance is
*May 15, 2011 by Susmitha*

**Physics**

Could some one tell m if this is right? 1)Does currend flow through a resistor or across a resistor in a series circuit? THROUGH 2) Is a voltage establishes through a resistor or across ? ACROSS PARALLEL CIRCUITS 1)there is a voltage drop of 6volts across each 2-Ù resistor the...
*March 25, 2009 by joshua*

**Physics**

a 9v battery is in series with a 10 ohm resistor, a 20 ohm resistor, and a 30 ohm resistor. What is the power absorbed by the 10 ohm resistor?
*February 13, 2011 by Bobby*

**physics**

A 59.0-Ω resistor is connected in parallel with a 116.0-Ω resistor. This parallel group is connected in series with a 15.0-Ω resistor. The total combination is connected across a 15.0-V battery. (a) Find the current in the 116.0-Ω resistor. _______ A (b) ...
*January 26, 2011 by ali-1*

**physics**

A 59.0-Ω resistor is connected in parallel with a 116.0-Ω resistor. This parallel group is connected in series with a 15.0-Ω resistor. The total combination is connected across a 15.0-V battery. (a) Find the current in the 116.0-Ω resistor. ______A (b) Find...
*February 1, 2011 by ashley*

**Physics, am i right?**

A 10.0 Ω resistor is in parallel with a 20.0 Ω resistor and supplied by a 9.0 V battery. What is the current passing through the 20.0 Ω resistor? (Points : 1) 0.45 A 0.90 A 1.35 A <--- 6.00 A
*May 27, 2014 by Me and I*

**physics**

Your electronic friend needs a 20 ohms resistor but has only 40 ohms resistor. He tells you that he can combine them to produce a 20 ohms resistor? How?
*September 8, 2010 by Christy*

**Physics**

The nominal resistance R of the resistor used in this experiment was printed on the resistor by the manufacturer. According to the manufacturer, the actual resistance of the resistor should not differ from its nominal value by more than 1%. Does your most accurate measured ...
*February 23, 2010 by Joseph*

**Physics**

A 5.0 Ω resistor, a 9.0 Ω resistor, and a 10.0 Ω resistor are connected in parallel across a 24.0 V battery. What is the equivalent resistance of the circuit? Answer in units of Ω
*February 19, 2013 by Kai*

**Science**

A thermally insulated 50ohm resistor carries a current of 1A for 1s. The initial temperature of the resistor is 10degree, its mass is 5g, and its specific heat capacity is 850j/kg/k. Calculate the change in entropy of the resistor and what is the change in entropy of the ...
*March 24, 2013 by Salando*

**Science**

A thermally insulated 50ohm resistor carries a current of 1A for 1s. The initial temperature of the resistor is 10degree, its mass is 5g, and its specific heat capacity is 850j/kg/k. Calculate the change in entropy of the resistor and what is the change in entropy of the ...
*March 24, 2013 by Salando*

**Science**

A thermally insulated 50ohm resistor carries a current of 1A for 1s. The initial temperature of the resistor is 10degree, its mass is 5g, and its specific heat capacity is 850j/kg/k. Calculate the change in entropy of the resistor and what is the change in entropy of the ...
*March 24, 2013 by Salando*

**Physics 2**

A(n) 78-Ù resistor and a 68-Ù resistor are connected in series across a battery. The voltage across the 78-Ù resistor is 25 V. What is the voltage across the 68-Ù resistor?
*February 16, 2012 by Anne*

**Physics**

A 61.5-Ω resistor is connected in parallel with a 146.6-Ω resistor. This parallel group is connected in series with a 16.0-Ω resistor. The total combination is connected across a 13.6-V battery. Find (a) the current and (b) the power dissipated in the 146.6-&#...
*October 3, 2014 by Elle*

**electrical**

6.A resistor R1 dissipates power P when connected to a certain generator with voltage V. If a resistance R2 is put in series with R1 the power dissipation by R1 A) Decreases B) Increases C) Remains the same D) Any of the above depending upon the value of R1 and R2
*March 1, 2012 by Anonymous*

**Physics**

Three resistors having the same resistance value are wired in parallel. How does the equivalent resistance compare to the resistance value of a single resistor? The equivalent resistance is thrice the value of a single resistor. The equivalent resistance is the same as the ...
*October 22, 2012 by BoBo*

** Electrical **

(2) 1500 Ù resistors are connected in series. They are then connected in parallel to a single (1) 5 kÙ resistor. a) Draw the circuit before and after reduction: b) What is the equivalent resistance of the circuit?
*March 12, 2011 by Chris Williams*

**physics**

The current in a 51 resistor is 0.14 A. This resistor is in series with a 28 resistor, and the series combination is connected across a battery. What is the battery voltage?
*February 2, 2011 by ali-*

**physics 102**

The output voltage of an AC generator is given by Δv = (180 V) sin (70πt). The generator is connected across a 13.0-Ω resistor. (a) By inspection, what is the maximum voltage? V (b) By inspection, what is the frequency? Hz (c) Find the rms voltage across the ...
*August 9, 2012 by Matt Will*

**College Physics**

You have 20 and 80 (unit is the upside down U) resistors in a circuit with a 100 V battery. A)These resistors are parallel. Find the current through each resistor and the voltage drop across each resistor. B) These resistors are connected in series. Find the current through ...
*February 7, 2010 by Kate*

**physics**

A resistor of resistance R is connected to a power supply of constant EMF E=12 V and internal resistance r=3 Ω . The energy dissipated in the resistor R is used to heat water. What resistance R in Ohms gives the maximum power dissipated in the resistor?
*May 13, 2013 by intermediate player PLEASE HELP*

**physics**

please tell me if thsi si correct Two equal charges are seperated by 3.7 * 10^-10 m. the force between the charges has a magnitude of 2.37 * 10^-3 N. What is the magnitude of q on the changes? f=1/4pi Er * q^2/r^2 2.37 * 10^-3 = 9*10^9 * q^2 ______________ (3.7 * 10^-10)^2 3....
*March 17, 2009 by physics*

**Physics**

1)A 15.0 resistor and a 20.0 resistor are connector in parallel. A 5.00 resistor is connected in series with this parallel arrangement. The resistors are connected across a 1.00(I think something else is suppose to be after that but its missing)10^2-V battery. What is the ...
*April 9, 2008 by Jon*

**series and parellel circuits**

ok here we go ... its a series-parellel circuit with 5 resistors. 12 volt battery- wire goes up then one wire branches up at 45 deg with a 10 ohm resistor then down at a 45 deg with a 10 ohm resistor, a second wire branches down at 45 deg with a 20 ohm resistor then up at a 45...
*May 21, 2012 by Dave*

**physics**

An 21.0 , 12.0 , and 5.0 resistor are connected in series with an emf source. The current in the 12.0 resistor is measured to be 4.00 A.
*May 10, 2012 by dan*

**Physics**

12 volts is applied across a 4 ohm resistor. How much power is dissipated by the resistor?
*November 29, 2012 by Hans*

**Physics**

1. A 40Ω , 20Ω and 60Ω resistor is connected in a parallel circuit. Which resistor would have the greatest current passing through it and why? 2. A 24Ω , 8Ω and 60Ω resistor is connected in a series circuit. Which resistor would have the greatest ...
*May 8, 2014 by Liz*

**Physics**

A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?
*February 26, 2013 by Brittany*

**Physics**

A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?
*February 26, 2013 by Brittany*

**Physics**

A 10-ohm resistor is attached to a 20-ohm resistor in series. This combination is then attached to a 30-ohm resistor in parallel. This is then connected to a 120-V battery. What is the current drawn from the battery?
*March 20, 2014 by Bano*

**physics.**

resistors of 30 ohms and 60 ohms are connected in parallel and joined in series to a 10 ohm resistor. the circuit voltage is 180 volts I need to find 1)the voltage of the parallel circuit 2)the resistance of the complete circuit 3)the voltage across the 10 ohm resistor 4) the ...
*May 18, 2011 by Nilan - please help*

**Physics**

An rms voltage of 120 V produces a maximum current of 2.6 A in a certain resistor.Find the resistance of this resistor?
*July 24, 2011 by Ryan*

**College physics**

Find the following currents. The current I_1 through the resistor of resistance R1 = 15.0 Ohm * The current I2 through the resistor of resistance R2 = 45.0 ohm. * The current I3 through the resistor of resistance R3 = 20.0 Ohm. * The current I4 through the resistor of ...
*July 17, 2010 by monique*

**Physics-College**

You have a 50V battery in a circuit with a single resistor R. If the resistor dissipates 200 J of energy in 5 seconds, what is its resistance?
*February 4, 2010 by Katie*

**Science **

3 resistors having the same resistance value are wired in parallel, how does the equivalent resistance compare to the resistance value of a single resistor? 1) The equivalent resistance is thrice the value of a single resistor. 2) The equivalent resistance is the same as the ...
*August 3, 2014 by Skylar*

**Physics**

The value of a real-world resistor ______ changes with significant time as the resistor conducts a current. never rarely sometimes usually
*February 9, 2011 by Jennifer*

**Physics**

Three resistors of value 1.0 , 2.0 and 4.0 are connected in a parallel circuit with a 6.0 V battery. a) What is the total equivalent resistance? b) What is the across each resistor? c) The power delivered to the 4.0 resistor?
*June 12, 2014 by Anonymous*

**Physics**

Explain what happens to the charge carriers in a semiconductor light dependant resistor when it is illuminated. Suggest why shining light onto an LED might be expected to generate a small voltage between its terminals. Thx A semiconducting light-dependent resistor excites more...
*February 17, 2007 by Ishani*

**Physics**

Use Kirchhoff's junction theorem to explain why the total equivalent resistance of a circuit is reduced, not increased, by connecting a second resistor in parallel to another resistor.
*June 5, 2011 by John*

**physics**

A resistor is to have a constant resistance of 30(ohm), independent of temperature. For this, an aluminum resistor with resistance R1 at 0(Celsius) is used in series with a carbon resistor with resistance R2 at 0(Celsius). Evaluate R1 and R2, given that a1=3.9 x 10^-3 degree ...
*February 6, 2011 by carlo*

**PhysicsPLEASE HELP**

i have a lab where we used VI method to calculate resistance of a LARGE resistor... circuit is as follows..(--- indicates wire) source---ammeter---resistor(voltmeter connected in parralel to resistor)---(connected back to source) the R value calculated was wrong. i need to ...
*February 9, 2010 by SAM*

**physics**

Each of the four circuits in the drawing consists of a single resistor whose resistance is either R or 2R, and a single battery whose voltage is either V or 2V. The unit of voltage in each circuit is V = 10 V and the unit of resistance is R = 8 Ω. Determine (a) the power ...
*February 14, 2013 by Anonymous*

**Physics**

1)Four resistors of 10.0 each are connected in parallel. A combination of four resistors of 10.0 each is connected in series along with the parallel arrangement. What is the equivalent resistance of the circuit? A)80.0 B)40.4 C)40.0 D)42.5 I got C 2)A 2.00 resistor, and a 12.0...
*April 9, 2008 by Jon*

**Physics 2**

Explain briefly the workings of electrical transformer, both step-up and step-down In a step-up transformer, compare the secondary voltage and current to the corresponding primary values. Explain briefly how transformers minimize losses in long distance electrical circuits. ...
*July 28, 2014 by seanmarch58*

**Ap physics**

Four resistors are connected to a battery with a terminal voltage of 12.0 V, (R1 = 40.0 , R2 = 80.0 , R3 = 140.0 and R4 = 15.0 ) (a) Determine the equivalent resistance for the circuit. 1 (b) Determine the current in the battery. 2 V (c) Determine the current in the 40.0 ...
*May 11, 2012 by Amelia*

**Physics**

I need help. Resistor 1: Watts=? Current=? Resistance=520 Volts=? Resistor 2: Watts=? Current=? Resistance=? Volts=57.5 Resistor 3: Watts=? Current=? Resistance=1200 Volts=? Total: Watts=? Current=? Resistance=? Volts=280 Find Resistor 2's resistance. Please help and Thank you
*September 21, 2013 by Anonymous*

**Science**

How does an electrical current in a circuit produce thermal, sound, and magnetic energy? The electrical current flows thru devices that convert the electrical energy to mechanical or electomagnetic waves. i have a science project do tommorrow but i need some pictures of the ...
*March 29, 2007 by SasukeUchihaFanatic*

**Physics**

What is the equivalent resistance of a parallel circuit with a 5.0 kΩ resistor, a 2.5 kΩ resistor, and 10.0 kΩ resistor? A. 0.10 kΩ b. 0.83 kΩ c. 10 kΩ d. 1.4 kΩ e. 18 kΩ
*June 3, 2014 by Me and I*

**circuits**

when a parallel 5k ohm resistor and a 25k ohm resistor have a 10v supply, what is the total power loss?
*March 19, 2013 by Anonymous*

**physics**

a 2 uF capacitor is connected in series with a 1.2 M ohms resistor and a 5 v battery for a long time. What is the current in the resistor 1s after disconnecting the battery?
*November 23, 2011 by JM*

**Physics**

Help me with this please A 10.0 Ω resistor is in parallel with a 20.0 Ω resistor and supplied by a 9.00 V battery. What is the total current passing through the circuit? A. 0.38 A B. 0.75 A C. 1.35 A D. 6.00 A
*June 3, 2014 by Me and I*

**physics**

A 75.0-W lamp is placed in series with a resistor and a 120.0-V source. If the voltage across the lamp is 24 V, what is the resistance R of the resistor?
*October 11, 2011 by ashley*

**physics**

A 350-ohm resistor is connected in series with a 270-ohm resistor. What is their equivalent resistance in ohms?
*November 2, 2011 by elisabeth*

**College physics**

Find the following potential differences. The magnitude of the potential difference DeltaV1 across the resistor of resistance R1 = 15.0 Ohm. The magnitude of the potential difference DeltaV2 across the resistor of resistance R2 = 45.0 Ohm. The magnitude of the potential ...
*July 17, 2010 by monique*

**Electronics**

A series circuit consists of a 12V source, a 470ohm resistor(R1), a 330ohm resistor(R2) and a diode. If the diode is reverse biased, what is the value of V(R1) and V(R2)?
*April 17, 2010 by Claire*

**physics**

A 250-ohm resistor is connected in parallel with a 190-ohm resistor. What is their equivalent resistance?
*November 2, 2011 by elisabeth*

**physics**

A DC circuit has a single battery of voltage V = 10.0 V attached to a resistor R = 100 Ohms. If the voltage is increased to 20.0 V, then by what factor does the power emitted by the resistor increase?
*March 5, 2014 by tyler*

**electrical circuit**

A 72-ohm coil of wire is connected in series with an adjustable resistor (rheostat) whose resistance can be varied from 0 to 88 ohms. If the line potential is 115 volts, calculate (a) the range through which the coil current can be varied, (b) the rheostat resistance when the ...
*August 24, 2014 by gilberT*

**Physics**

Consider the circuit shown in the figure below. Use the following as necessary: R1 = 11.00 Ù, R2 = 1.40 Ù, and V = 6.00 V. (a) Calculate the equivalent resistance of the R1 and 5.00 Ù resistors connected in parallel. 1 Ù (b) Using the result of part (a), calculate the combined...
*October 5, 2010 by chuck*

**Physics**

A capacitor of capacitance C= 10mF, is charged using a battery of potential V, through a resistor of resistance R = 250 ohms. the charge of the capacitor is given by Q(t)=CV[1− e ^ (−t/RC)] Find an expression for the current passing through the resistor as a ...
*March 21, 2010 by drwales*

**College Physics**

I need help with this question, A 4-ohm resistor is connected in parallel with a 6 ohm resistor. What is the total resistance of this pair of resistors? I know the answer is 2.4 ohms, but I don't know how to get it. Please help!!
*April 4, 2009 by Michael*

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