Monday

April 21, 2014

April 21, 2014

Number of results: 183

**Science**

What is the rule for combining resistors in series and parallel circuits( combination circuits)?
*Wednesday, October 17, 2007 at 11:40pm by Jeni*

**science**

how does an electric ciircuit work? Books have been written about electrical circuits, what kinds, specilized circuits, etc. You need to be a little more specific with your question.
*Monday, April 23, 2007 at 12:40pm by garret*

**physics**

Given circuits for f and f−1, we can create classical reversible circuits Rf, R−1f, Rf−1, R−1f−1 which are shown in the following figure. (Assume that f is a bijection.)In what sequence shall we apply the above circuits in order to implement a ...
*Wednesday, March 6, 2013 at 4:02am by s*

**physics**

Design some simple digital circuits based on Boolean expressions. Draw circuits that implement the following Boolean expressions using some combination of AND, OR, NOT, NAND, and NOR gates. - NOT X OR NOT Y OR Z - X OR Y OR NOT Z - NOT X AND Y OR NOT Y AND Z Write a two to ...
*Wednesday, June 10, 2009 at 1:18am by Sandhya*

**science**

Volts measure the force pushing the electrons around in a circuit, and amperes measures how many of them (or how much "charge") flows through any part of the circuit in a fixed time. In most circuits, (volts)/(amperes) = resistance (in ohms), where the resistance (R) is a ...
*Sunday, May 25, 2008 at 1:14am by drwls*

**physics**

The figure below shows three circuits, each consisting of a switch and two capacitors, initially charged as indicated. Let qL represent the charge on the left-hand capacitor in each circuit. The switches in all circuits are then closed.
*Tuesday, April 9, 2013 at 7:51pm by bryan*

**Circuits**

In Circuits lab, we had to construct different types of operational amplifiers. The inverting and summing amplifiers produced similar output voltage to the calculated ones but were not negative. I was just wondering why they didn't reverse the sign in the experiment?
*Monday, April 30, 2012 at 2:46am by Ana*

**Circuits**

In Circuits lab, we had to construct different types of operational amplifiers. The inverting and summing amplifiers produced similar output voltage to the calculated ones but were not negative. I was just wondering why they didn't reverse the sign in the experiment?
*Monday, April 30, 2012 at 10:41am by Ana*

**physics**

for circuits with either an inductor or capacitor, the current gets out of phase with the voltage. for these circuits how are the frequencies of the current and voltage related?
*Friday, March 9, 2012 at 9:08am by fatih*

**Statistics**

An electronic product contains 32 integrated circuits. The probability that any integrated circuit is defective is 0.02, and the integrated circuits are independent. The product operates only if there are no defective integrated circuits. What is the probability that the ...
*Thursday, February 20, 2014 at 7:41pm by Ashley*

**Electronics, Physics, Circuits**

1) When is the energy dissipated measured? RC circuits discharge with a specific rate. 2) Inductances have energy stored in the magnetic field in accordance with 1/2 L i^2, where i is current. Because current and voltage are 90 degrees out of phase (pure L circuit), it is not ...
*Friday, October 23, 2009 at 4:00am by bobpursley*

**Physics**

The reason I only asked the first part was I first wanted to understand how to construct it before I figured out the rest because I have three more sets of circuits to do so now I understand that part. I wasn't trying to mislead you-I really appreciate the help alot and can ...
*Saturday, March 26, 2011 at 6:15pm by Aubrey*

**Art**

GOT THIS FROM GOOGLE, HOPE IT HELPS A printed circuit board, or PCB, is a self-contained module of interconnected electronic components found in devices ranging from common beepers, or pagers, and radios to sophisticated radar and computer systems. The circuits are formed by a...
*Tuesday, March 3, 2009 at 3:40pm by JASMIN*

**math**

A calculator requires a keystroke assembly and a logic circuit. Assume that 83% of the keystroke assemblies and 92% of the logic circuits are satisfactory. Find the probability that a finished calculator will be satisfactory. Assume independence of keystroke assemblies and ...
*Thursday, September 24, 2009 at 4:16pm by jessica*

**math**

A calculator requires a keystroke assembly and a logic circuit. Assume that 83% of the keystroke assemblies and 92% of the logic circuits are satisfactory. Find the probability that a finished calculator will be satisfactory. Assume independence of keystroke assemblies and ...
*Thursday, October 1, 2009 at 11:02pm by Aleah*

**Discrete Mathematics**

Consider the complete graph with 5 vertices, denoted by K5. A. Draw the graph. B. How many edges are in K5? How many edges are in Kn? C. Find an isomorphic representation (graph) of K5. Give the isomorphism mappings. D. Does K5 contain Eulerian circuits? (why?) If yes, draw ...
*Saturday, August 3, 2013 at 11:41am by Joy*

**electrical**

http://www.inspectapedia.com/electric/Circuits.htm
*Wednesday, December 2, 2009 at 7:16pm by Ms. Sue*

**science**

http://www.physicsclassroom.com/class/circuits/u9l3d.cfm
*Friday, June 10, 2011 at 12:09pm by TutorCat*

**Electrons circuits**

rectify the speaker voltage with a diode followed by a capacitor in parallel with a large resistor (long RC time constant) to allow a discharge path. Then, that voltage will be a dc signal of about 1.3 volts dc, enough to sense. Using this sense signal, you can operate any ...
*Friday, April 4, 2008 at 11:26pm by bobpursley*

**Physics- Circuits**

Thanks!
*Saturday, April 12, 2008 at 5:09pm by Bobby*

**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 ...
*Sunday, March 3, 2013 at 9:54pm 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 ...
*Sunday, March 3, 2013 at 10:23pm by Please Urgent Urgent! math help!!*

**French**

Thank you for using the Jiskha Homework Help Forum. Let me tell you that you had best trust your textbook, because I know next to nothing about electricity and circuits! 1. Le fils par lequel le courant électrique coule. Where on earth did "ca" come from? There is no such word...
*Saturday, May 10, 2008 at 6:46pm by SraJMcGin*

**Physics**

anyone can help me on the RL circuits?
*Wednesday, May 1, 2013 at 3:49am by DOnny*

**Physics**

How do I also do combinations circuits?
*Monday, October 15, 2007 at 8:08pm by Soly*

**science**

what does p.c.b stand for when your working with circuits?
*Wednesday, October 1, 2008 at 1:58pm by zazi*

**Physics - Circuits**

Oh right, there's a current of 0.1 A
*Tuesday, February 14, 2012 at 7:48pm by Anonymous*

**Physics**

need help on 2 RL circuits D:
*Wednesday, May 1, 2013 at 3:49am by DOnny*

**Physics- Circuits**

You are welcome but ALWAYS check my arithmetic :)
*Saturday, April 12, 2008 at 5:09pm by Damon*

**Circuits Problem (Physics)**

omg! thankss!!
*Saturday, April 12, 2008 at 5:29pm by Eileen*

**Physics**

How are series and parallel circuits wired?
*Monday, May 12, 2008 at 5:30pm by Kelly*

**Circuits**

See 3-3,9:17am post for solution.
*Saturday, March 3, 2012 at 12:37pm by Henry*

**Math!! Algebra!!**

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 ...
*Sunday, March 3, 2013 at 9:54pm by Please Urgent math help!!*

**electricity**

closed circuits allow current to flow. b b
*Tuesday, August 23, 2005 at 8:55pm by bobpursley*

**Circuits Problem (Physics)**

Sorry, can not open your image :(
*Saturday, April 12, 2008 at 5:29pm by Damon*

**math**

actually I would pick b) but I do electrical circuits :)
*Monday, January 5, 2009 at 3:01pm by Damon*

**physics-series and parellel circuits**

R3 is 3 ohms
*Sunday, May 20, 2012 at 5:01pm by Dav e*

**Physics**

No. THe circuit breaker could be broken, or the appliances on different circuits.
*Wednesday, March 26, 2008 at 8:46pm by bobpursley*

**physics**

What are some examples of real resistors used in circuits?
*Tuesday, July 19, 2011 at 9:57am by Tina*

**MITx: 6.002x Circuits and Electronics**

Moreover, I can not see the circuit !
*Saturday, February 8, 2014 at 11:05am by Damon*

**Science - Electric Circuits**

A __________is the flow of _________ along a path?
*Tuesday, March 11, 2008 at 7:26pm by Evan*

**physics-series and parellel circuits**

whoops, right. I multiplied wrong
*Sunday, May 20, 2012 at 5:01pm by Damon*

**physics-series and parellel circuits**

OOOPA and the voltage at R1, R2 and R3
*Sunday, May 20, 2012 at 5:01pm by Dav e*

**Science**

Can you advise me on how to draw electrical circuits for equipment in my room such as my tv and stereo. Thanks
*Monday, October 12, 2009 at 1:43pm by Lewis*

**physics-series and parellel circuits**

For R1 voltage .. E=I*R E=8*12=96 volts correct?
*Sunday, May 20, 2012 at 5:01pm by Dav e*

**circuits**

i've tried total impedance formula sq root Xs^2+r^2= but i believe its isn't correct
*Thursday, May 30, 2013 at 2:57am by Adam*

**Circuits Problem (Physics)**

b) i1+i2 = 2/3 + 8/9 = 14/9 times the resistance which is 6 = 28/3 volts a above b
*Saturday, April 12, 2008 at 5:29pm by Damon*

**Physics- Circuits**

Thanks again! and I will definitely check your arithmetic to make sure. You are seriously the best helper here! =]
*Saturday, April 12, 2008 at 8:05pm by Bobby*

**science**

Yes, C. Short circuits may still happen, but when they do the outside of the appliance will remain at ground potential, and safe to handle.
*Saturday, February 28, 2009 at 3:41pm by drwls*

**Physics**

Why is parallel circuit brighter compared to series? ( Only one bulb is present in both circuits) Thanks :)
*Sunday, August 26, 2012 at 7:02am by Tiffany*

**MITx: 6.002x Circuits and Electronics**

sorry, 8.01 and 6.0 anything are not subjects I respond to. Been there, done that. You are all on your own.
*Saturday, February 8, 2014 at 11:05am by Damon*

**about Engineering**

Electronic and Communication Engineering is mainly Mathematical analysis, implemented in practical circuits. You have to understand higher forms of math, and think in those terms. You have to understand the imperfect models used for systems analysis. You have to understand ...
*Thursday, May 24, 2007 at 6:41am by bobpursley*

**Electronics/Circuits**

Just a simple one... which symbol should I use to represent a strain gauge on circuit diagram? Thanks
*Sunday, May 11, 2008 at 1:00pm by Jake*

**Physical Science**

Goodness: MC, you dont know what the terms open and closed circuits mean. Review that, it is basic to all this.
*Friday, May 22, 2009 at 5:18pm by bobpursley*

**Electrical Circuits**

find the number of free electrons in a copper conductor having a diameter of 0.064 in. and a length of 1000ft.
*Sunday, November 20, 2011 at 1:29am by Marc Eugene Adriano*

**circuits**

in a parallel RLC circuit you have L=100mH and i= inductor current i=50e^(-4000t)-10e^(-5000t) mA how do you find R and C??
*Monday, March 23, 2009 at 6:11pm by alice*

**series and parellel circuits**

Hi Bob, just to make sure... I figure out the top and bottom .. and not the left and right .. is that correct?
*Monday, May 21, 2012 at 11:47am by Dave*

**Circuits/physics**

For the element shown below, v(t)=1/2tVolts and i(t) = 12t-4t^2 Amps. (a) Find the instantaneous power p(t) as a function of time. + v(t) - |------| -----| |----- |------| i(t)----->
*Sunday, August 23, 2009 at 8:21pm by Bobby*

**circuits**

Determine the gain in dB for a filter that has an output power of 4.9 W and an input power of 3.6 mW.
*Thursday, May 30, 2013 at 2:58am by Adam*

**Physics**

resistance in series circuits increases as you add resistance.
*Saturday, May 19, 2012 at 12:04pm by bobpursley*

**electrical**

The minimum size of electrical cable recomended for use inpower circuits by the NEC in adomestic installation is
*Saturday, October 31, 2009 at 9:57pm by Brannico*

**Circuits Problem (Physics)**

hi, i put spaces between the "h t t p :" because it wouldnt let me post it otherwise. if you delete the spaces it should load (i hope!).
*Saturday, April 12, 2008 at 5:29pm by Eileen*

**circuits **

If a series RLC circuit has R = 25 ohm, XL = 50 ohms, and XC = 30 ohms, what will be the total impedance?
*Thursday, May 30, 2013 at 2:57am by Adam*

**Physics- Circuits**

At time t=0, a potential difference of 475 V is applied to a coil with an inductance L=0.642 H and a resistance R=36 ohms. How long does it take to reach 20 percent of maximum energy in the inductor?
*Saturday, April 12, 2008 at 5:09pm by Bobby*

**Circuits/physics**

Power where? Delivered to the capacitor? You don't show a resistor. Your circuit seems to have been lost in translation to the figure shown. Is this an AC circuit or is v(t) a general function?
*Sunday, August 23, 2009 at 8:21pm by drwls*

**circuits**

when a parallel 5k ohm resistor and a 25k ohm resistor have a 10v supply, what is the total power loss?
*Tuesday, March 19, 2013 at 10:37pm by Anonymous*

**science**

There are three sources of resistance in a parallel circuit. Two of them are rated at 20 ohms, the other at 10 ohms. What is the circuits total resistance?
*Monday, July 5, 2010 at 7:22pm by teresa*

**physics**

1. less than 1 cm/s. The exact number depends upon current and wire diameter 2. On the average, zero. Electrons go back and forth in AC circuits. Maximum values are comparable to DC, but plus and minus
*Friday, July 16, 2010 at 1:42pm by drwls*

**Circuits without figure**

Sorry, without the accompanying figure, it is quite difficult to guess what the circuit is like. See if you can post a link, although it is not always possible.
*Tuesday, October 5, 2010 at 12:42am by MathMate*

**circuits**

A string of five series resistors is connected across a 20 v battery. Zero volts are measured across all the resistors except the second one. What can be wrong with this circuit?
*Thursday, May 30, 2013 at 2:56am by Adam*

**physics**

You will have to tell us what a "plug key" is. Air gaps are essentially open circuits. Current can only flow if there is alternating current or the voltage is high enough to cause ionization of the air.
*Sunday, August 21, 2011 at 11:22pm by drwls*

**Physics - Circuits**

Theres a circuit wired in series that has 4 resistors. 1) 10 ohms 2) 6 ohms 3) 1 ohms 4) 2 ohms Find the potential difference across the 10ohm resistor. Answer in units of V What exactly am i supposed to do to calculate this?
*Tuesday, February 14, 2012 at 7:48pm by Anonymous*

**science 6 helppppppppppppppppppp**

The power will be the number of watts delivered. The power is amps x volts (potential difference) the batteries are identical so the volts are the same. Thus, the current in the two circuits must be different, why do you think that this might be?
*Sunday, February 13, 2011 at 1:44am by Dr Russ*

**Science**

What are fuses and why do they come in different sizes? Fuses are devices placed in electrical circuits as protection for those circuits. They consist of small pieces of wire, sometime as ribbons, and are placed in series with the circuit so that the current passing through ...
*Thursday, September 28, 2006 at 1:37pm by Bethan*

**physics**

The current in a series path flows in one path. The second question is idiotic. Parallel is probably the best answer. No,the current in parallel circuits is not the same.
*Saturday, February 2, 2008 at 4:46pm by bobpursley*

**Science**

I'm sorry, but my ESP circuits have malfunctioned, so I have no idea what "problem" you mean. Please note that this is a public homework help forum_search_20140419 and is not part of your or any school's private domain. If you want us to help you, you must give us complete ...
*Friday, August 21, 2009 at 8:05pm by Ms. Sue*

**Physics- Circuits**

b is just more of the same. You did nothing to add or subtract Q so the charge is the same and work out from there. if in iv the U goes up. you had to push in to raise the potential energy stored. If U goes down, the dielectric gets pulled in
*Saturday, April 12, 2008 at 8:05pm by Damon*

**circuits**

a parallel RLC bandpass circuit with C=10nF and Q=10 has a center frequency of 500 krad/s. Find R,L and the two cutoff frequencies. Can you design this circuit using a cascade connection of two first-order filters seperated by a follower?
*Monday, April 20, 2009 at 10:59pm by alice*

**French**

how would you say "the wire through which the electric current flows." wouold it be, Le fils ca le courant electrique couler a travers. Load(as in electricity): A device that transforms electrical energy into other forms of energy. is it, "Charge: un appareil ca transformer l'...
*Saturday, May 10, 2008 at 6:46pm by Slappy*

**College Physics**

In ordinary laboratory circuits, charges uC (microcoulomb) and nC (nanocoulomb) range are common. How many excess electrons must you add to an object to give it a charge of (a) -2.50 uC (b) -2.50 nC.
*Monday, January 21, 2008 at 12:22pm by Jen*

**Circuits**

I want to know why is it that a voltage in a capacitor cant change instantaneously and why the current in an inductor cant change instantaneously either. Also, a capacitor stores energy, like a battery, right? Why is it that it can't be used to power, say, and electric train ...
*Saturday, March 10, 2012 at 1:40am by Tina*

**optical circuits**

Two 1-km fibers are spliced together. Each fiber has a 5-dB loss, and the splice adds 1 dB of loss. If the power entering is 2 m W, then how much power is delivered to the end of this combined transmission line?
*Saturday, August 31, 2013 at 10:06pm by bree*

**physics**

Do you read your text? Do you go to class and take notes? I am fairly certain you are not so helpless. Look in your text under RC decay. I will be happy to critique your thinking, but honestly, I think you are answer grazing. This relation in RC circuits is pretty basic.
*Monday, July 26, 2010 at 2:22pm by bobpursley*

**Introduction to Electricity and Circuits**

A light bulb is wired in series with a 142 resistor, and they are connected across a 120 V source. The power delivered to the light bulb is 22.3 W. What are the two possible resistances of the light bulb?
*Sunday, February 6, 2011 at 10:28pm by Jiji*

**Physics**

Hey all. I have to find Thevenin’s UTHEV and RTHEV, which can replace the circuit found here: img24.imageshack.us/img24/1723/thevenin.jpg I can do it for small circuits, but this one confuses me a bit. Hope you can get me goig. Thank you very much.
*Saturday, March 14, 2009 at 6:33pm by Muusen*

**college**

A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. 1. What are the upper and lower control limits for a sample size of 100? 2. Recompute the upper and lower control limits ...
*Wednesday, December 8, 2010 at 4:01pm by jackie*

**Math**

A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. 1. What are the upper and lower control limits for a sample size of 100? 2. Recompute the upper and lower control limits ...
*Thursday, December 9, 2010 at 9:27am by jackie*

**physics**

Things that go back and forth. In electronics, they are circuits in which currents go back and forth.
*Thursday, March 3, 2011 at 9:04am by drwls*

**circuits**

For the transfer function Tv(s)=[10(s+5)(s+20)]/[(s+1)(s+100)] is this a low-pass, high-pass, bandpass or bandstop function? estimate the corner frequency(ies) estimate the passband gain what is the output if v1(t)=10cos(1000t+45deg) V??
*Monday, April 20, 2009 at 10:54pm by alice*

**computers**

which set of terms below correctly pairs a generation of computers with key innovation associated with it? a. 2nd generation/ intergrated circuits b. 3rd generation/programming languages c. 4th generation/ operating systems d. 5th generation/artificial intelligence
*Monday, November 12, 2007 at 9:28pm by holli*

**French/Science**

I know i posted this already but no One really answered how would you say "the wire through which the electric current flows." wouold it be, Le fils ca le courant electrique couler a travers. Load(as in electricity): A device that transforms electrical energy into other forms ...
*Saturday, May 10, 2008 at 11:47pm by Slappy*

**Circuits Problem (Physics)**

2/3 = 6/9 = i1 8/9 = i2 so i2>i1 so the one on the right will run out first (8/9) t = 20 amp hr t = 9*20/8 = 9*5/2 = 22.5 hr
*Saturday, April 12, 2008 at 5:29pm by Damon*

**Circuits Problem (Physics)**

at present i1 = 6/9 and i2 = 8/9 clearly if I multiply the voltages by 9 I will get 6 amps and 8 amps then if I divide both voltages by two I will get 3 amps and 4 amps so multiply the voltage by 9/2 (9/2)12 = 54 volts
*Saturday, April 12, 2008 at 5:29pm by Damon*

**Physical Science, ipc**

Which can you do to reduce the power consumption in your home? ________________________________________ A. Add more circuit breakers. B. Wire more parallel circuits. C. Replace 75-watt light bulbs with 40-watt light bulbs.
*Thursday, July 15, 2010 at 1:38pm by Superman*

**Science**

Definitely not my area, but there are some promising looking sites on this GOOGLE Search: http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla:en-US:official&hs=QqP&ei=l3HTSr-TKIOYMdeX1ZQD&sa=X&oi=spell&resnum=0&ct=result&cd=1&ved=0CBIQBSgA&q=how+to+draw+...
*Monday, October 12, 2009 at 1:43pm by SraJMcGin*

**current physics**

when dealing with circuits, and you say "the voltage across the battery" and "a current through the battery" what do the words across and through mean.
*Thursday, February 5, 2009 at 2:34am by Anonymous*

**Physics**

Your lab partner says that a battery provides not a source of constant current, but a source of constant voltage. Do you agree or disagree and why? Also I am really confused with series and parallel circuits like when voltage, current, and resistance increase and decrease
*Saturday, April 14, 2012 at 3:06pm by rebekah*

**Physical Science, ipc**

Power consumption depends upon how many lights and appliances are on, and how much power they consume. The power consumption of all things "on" adds up. Adding more circuits or outlets on a given circuit, does no decrease power consumption. What do you think the answer would be?
*Thursday, July 15, 2010 at 1:38pm by drwls*

**Circuits**

How do I design a low pass filter for an Fc = 4000 Hz and a high pass filter for Fc =2000 Hz?
*Monday, April 9, 2012 at 11:05pm by Heather*

**Physics**

I've solved RL circuits using circuit simulator software. Anyhow for Q4 part - a) I1=0,I2=V/(2R+R) part - b) I1=V/2R,I2=0 These formula can be used but I haven't used these..
*Friday, April 26, 2013 at 1:20pm by X10*