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October 1, 2014

Search: an induced emf

Number of results: 496

Ap Chemistry
Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I kept getting .55V but it is wrong. Can someone please help me?
October 21, 2010 by brian

physics
A battery of emf and negligible internal resistance is connected to two resistances R1 and R2 in series. What is the potential difference across R2?(a)E(R1+R2)/R2(b)E(R1+R2)/R1(c)ER2/R1+R2(d)ER1/R1+R2
September 15, 2013 by john

College Physics
After 2.5 time constants, what percentage of the final voltage, emf, is on an initially uncharged capacitor C, charged through a resistance R?
September 16, 2014 by Van

Science-3 questions.
Which of the following best describes the climates of Europe and North America during the 1.8 million years of the Quaternary period? hot and dry cool and rainy periods followed by droughts warm and mild a series of ice ages followed by periods when the glaciers melted Which ...
December 11, 2013 by Princess Anna

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
What is the inductance of a coil if the coil produces an emf of 8.20 V when the current in it changes from -28.0 mA to +31.0 mA in 45.5 ms?
April 11, 2010 by JOSE

Physics
3) What is the emf of a battery with an internal resistance of 0.15 if the battery delivers 1.5 A to an externally connected 5.0 resistors?
June 12, 2014 by Anonymous

Physics
what current will flow through a resistance of 11 ohms when the emf impressed acrosss the resistance is 2.8 volts?
May 17, 2011 by Nilan

Chemistry
A cell has a standard emf of +0.177 V at 298 K. What is the value of the equilibrium constant for the cell reaction a) if n=1? b) if n=2?
April 8, 2013 by Summer

physics
A generator has a terminal voltage of 102V when it delivers 10.3 A, and 92 V when it delivers 31.9 A. Calculate the emf. Answer in units of V
June 2, 2013 by Anonymous

physics
An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery?
February 24, 2014 by mercedes

ECONOMICS AND DEVELOPMENT
Critically discuss various theory of underdevelopment.Is underdevelopment internally or external induced phenomenon.
September 27, 2010 by BERNICE

science
when a bar magnet is moved toward a stationary conducting loop which direction does the induced current in the loop flow?
June 9, 2011 by harold

physical science
If the number of coils in the wire is doubled from 100 to 200, and the original rate of 2 times per second is kept the same, what will be the new voltage induced?
July 7, 2010 by somone

Advance Coding
how to code the following with POA indicator patient admitted for chemotherapy for an azathioprione I V58.11, 285.3 drug induced aplastic anemia 284.89/D61.1.
May 4, 2013 by Louise Bradley

physics
In the figure , the total resistance is 13.0 k \Omega, and the battery's emf is 32.0 V. If the time constant is measured to be 40.0 \mu s. Calculate the total capacitance of the circuit.
April 26, 2011 by Anonymous

Physics blehhhh
A 0.35 m2 coil with 50 turns produces a maximum emf of 45 volts in a magnetic field of 0.4 Tesla. What is the speed of rotation of the coil?
January 27, 2013 by anonymous

science
a current can be induced in a closed circuit without the use of a battery or an electrical power supply by moving the circuit through a?
March 25, 2011 by Anonymous

physics
A battery has an internal resistance of 0.016 and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.75 V?
March 22, 2012 by Anonymous

Physics
A battery has an internal resistance of 0.017 ┘ and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.75 V?
February 23, 2013 by Don

medical coding
What are the ICD-9-CM codes for azathioprine drug induced aplastic anemia with peripheral neuropathy of multiple joints of the lower extremities secondary to severe rheumatoid arthritis
September 27, 2013 by Anonymous

physics
A solenoid of radius 2.30 cm has 380 turns and a length of 15.0 cm. (a) Find its inductance. (b) Find the rate at which current must change through it to produce an emf of 76.0 ÁV
November 12, 2012 by Anonymous

Physics
A 0.35 m2 coil with 50 turns produces a maximum emf of 45 volts in a magnetic field of 0.4 Tesla. What is the speed of rotation of the coil? Can you show the steps too so I can understand? Thanks
January 28, 2013 by Anonymous

ap chemistry
Find the equilibrium constant for the reaction Cr(s) + Zn2+(aq)→Cr2+(aq) + Zn(s) if the standard cell emf is −0.76 V at the cathode and −0.91 V at the anode. RT - F= 0.025693 V
September 27, 2013 by Gabriella

Physics
Batteries are not perfect. Instead they have an "internal resistance, a catch all phrase which describes the internal chemical workings of the battery which prevents it from providing an unchanging voltage regardless ofnits load. A simple model of internal resistance attaches ...
March 9, 2008 by raks

health
The eating disorder characterized by compulsive overeating followed by self-induced vomiting and the use of laxatives or diuretics is A. malnutrition. B. cirrhosis. C. anorexia nervosa. D. bulimia. i know that is C or D D is my guess right
August 27, 2008 by AK

Chemistry
Calculate the cell emf (in volts) for the following reaction at 25░C: Ni(s) + 2 Cu2+(0.010 M) → Ni2+(0.0010 M) + 2 Cu+(1.0 M) [Enter only the number of your answer.] Answer
November 15, 2010 by Diana

Chemistry
Predict the standard emf of each of the following galvanic cells. (a) Sn(s)|Sn2+(aq)||Sn4+(aq),Sn2+(aq)|Pt(s) (b) Pt(s)|Fe3+(aq),Fe2+(aq)||Ag+(aq)|Ag(s) I don't want the answer, I want the procedure/methods of how to do these types of problems.
June 21, 2013 by Sara

AP Chemistry
Calculate the standard cell emf for galvanic cells with the cell reaction 2H2(g) + O2(g)→2H2O(ℓ)in acidic solution. Answer in units of V
September 26, 2013 by Gabriella

physics
The rectangular coils in a 331 turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.95 T?
February 27, 2014 by rosita

physics
a storage battery of emf 8V internal resistance 1 ohm is being charged by a 12 V d.c source using a 15 ohm resistor in series in the circuit. Calculate the current
August 10, 2014 by mowgli

physics
Assume the resistance values are R1 = 2,800 Ω, R2 = 1,500 Ω, R3 = 4,400 Ω, and the battery emf is 1 = 1.3 V.
May 23, 2013 by Anonymous

basic electrical engineering
a battery havibg an emf of E volt and internal resitance .1ohm is connected across the treminals A and B. Calculate the value of E inorder that the power dissipated in the 2 ohm resistoe is 2 watt
August 13, 2011 by Gisu

Science
An airplane traveling at 9.50 102 km/h passes over a region where Earth's magnetic field is 4.4 10-5 T and is nearly vertical. What voltage is induced between the plane's wing tips, which are 75 m apart? What's the formula for this question?
April 1, 2008 by Monica

physics!
A battery has an emf of 8V and an internal resistance 2ohms. If it is connected to an external circuit that draws 6W of power, what is a possible current in the circuit? Please give me some ideas to do it! THANKS!
March 23, 2008 by Irena

Physics
A resitor of unknown resistance and a 35-omega resistor are connected across a 120-V emf device in such a way that an 11-A current flows. What is the value of the unknown reisistance?
April 10, 2011 by John - PLEASE Help!

physio
satiety would be induced by all of the following EXCEPT a. cholecystokinin b. naloxone c. morphine d.seratonin I know its not a or c, because those induce satiety. I'm stuck between b and c ...i think its b though
December 11, 2008 by Natash

physics
The electrical motor runs on a D.C source of emf E and internal resistance r. Show that power output of the motor is max where current drawn by the motor is E/2r.
March 16, 2010 by Edwin

history
the victory at yorktown in 1781: 1. ended the fighting in America 2. was solely the result of american arms 3. resulted from french control of the sea 4. induced george III to make peace promptly I think it is 4
September 13, 2008 by kyle

Physics
A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 21.8 V. The electric power being dissipated by the internal resistance of the battery is 36 W. Find the emf of the battery.
February 18, 2013 by Anonymous

Physics
If the emf of a battery is 23 V and a current of 66 A is measured when the battery is shorted, what is the internal resistance of the battery? Answer in units of Ω How would you set up the equation to solve?
March 4, 2013 by Tiffany

physics
A wire that is 0.86 meters long is moved perpendicularly through a constant magnetic field of strength 0.035 newtons/ampĚmeter at a speed of 6.0 meters/second. What is the emf produced?
December 20, 2013 by Anonymous

physic help
The magnetic flux through a coil of wire changes from 8 Txm ^2 to zero in a time 0.5 s. what is the magnitude of the average voltage induced in the coil during this change? please explain your answer..
December 12, 2010 by mash

physics
a battery with and emf of 12V and an internal resistance of 0.5 ohms, is connected in series to a resistor of 5.0 ohms. what is the terminal voltage (n V) of the battery?
April 12, 2010 by mandy

Physics
What is the emf of a battery with a 0.15 Ω internal resistance if the battery delivers 1.5 A to an externally connected 5.0 Ω resistor?
February 14, 2011 by Adam

grammar
General endotracheal anesthesia was induced, and the patient was prepped and draped. prepositions and conjunctions and the = the conjunctions preposition = was prepped
July 5, 2009 by tina

Grammar
Can you help me with the Prepositions and Conjunctions in this sentence? General endotracheal anesthesia was induced, and the patient was prepped and draped. Prepositions: I am not sure. Conjunctions: and Thanks.
October 1, 2011 by Cindy

Physics
A series combination of two resistors of resistance 12 ┘ and 8 ┘ is connected across a source of emf 24 V. What is the potential difference across 8 ┘ resistors? Do you know the formula for this?
January 24, 2013 by struggling student

ap chemnstry
What is the standard reaction free energy if the standard cell emf is 1.23? Faradayĺs constant is 96485 C/mol. Answer in units of kJ/mol
September 26, 2013 by Gabriella

College Physics
The rectangular coils in a 201-turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.81 T? I'm not sure what equations to use.
April 25, 2013 by Valerie

Science Physics
Calculate the time it takes for the voltage across the resistor to reach 11.0V after the switch is closed. the total resistance is 10.0kΩ , and the battery's emf is 27.0V . If the time constant is measured to be 34.0μs .
August 26, 2013 by Ti

physics
A 19 turn circular coil of wire has diameter 1.09 m. It is placed with its axis along the direction of the Earth's magnetic field of 51.0 ÁT, and then in 0.195 s it is flipped 180░. An average emf of what magnitude is generated in the coil?
November 13, 2013 by Cassandra

physics
if emf of a circuit is ddoubled and the resistance ofthe circuit is also doubled the current will : be doubled be reduced one-half remain the same
May 16, 2011 by Susmitha

chemistry
Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V Can someone please help me? I have the equation: 2Cr +3Pb(+2) --> 2Cr(+3) + 3Pb
October 21, 2010 by Fred

physics-quick question
If you have a rectangular loop of area A placed in a region where the magnetic field is perpendicular to the plane of the loop, than would the emf be zero because they are perpendicular?
April 16, 2008 by Jessica

physics
A moving rod is 12.0 cm long and moves with a speed of 15.0 cm/s. If the magnetic field is 0.800 T, calculate (a) the emf developed, and (b) the electric field in the rod. I got a)0.0132v and b).12v/m
October 9, 2010 by dude

Physics
A 50-cm wire placed in an East-West direction is moved horizontally to the North with a speed of 2 m/s. The Horizontal and Vertical components of the earth's magnetic field at that location are 25 ýT and 50ýT respectively. What is the emf between the ends of the wire? A) 30 ýV...
March 12, 2013 by Liz

scince@@@
i have to make a model for science fair. Any new development!. So please give me only idea that which new development can be possible with the help of eddy currents or induction of emf...........
September 28, 2013 by edward

CHEMISTRY HELP !!!!
a.) which of the following reactions should have the larger emf under standard conditions & why? CuSO4 (aq) + Pb (s) goes to PbSO4 (s) + Cu (s); Cu(NO3)2 (aq) + Pb(s) goes to Pb(NO3)2(aq) + Cu(s) b.) Calculate delta G for the reaction.
April 19, 2014 by Ali

physics
A flat loop of wire consisting of a single turn of cross-sectional area 8.10 cm2 is perpendicular to a magnetic field that increases uniformly in magnitude from 0.500 T to 1.90 T in 0.95 s. What is the resulting induced current if the loop has a resistance of 2.80 ?
November 13, 2013 by Cassandra

PHYSICS
A flat loop of wire consisting of a single turn of cross-sectional area 8.10 cm2 is perpendicular to a magnetic field that increases uniformly in magnitude from 0.500 T to 1.90 T in 0.95 s. What is the resulting induced current if the loop has a resistance of 2.80 ?
November 16, 2013 by Begging for help

Physics
An infinite straight wire carrying a current I=5 A flowing to the right is placed above a rectangular loop of wire with width w=11 cm and length L=27 cm, as shown in the figure below. The distance from the infinite wire to the closest side of the rectangle is h=1.7 cm. The ...
June 14, 2013 by Annoyingmous

Physics
An infinite straight wire carrying a current I=5 A flowing to the right is placed above a rectangular loop of wire with width w=11 cm and length L=27 cm, as shown in the figure below. The distance from the infinite wire to the closest side of the rectangle is h=1.7 cm. The ...
June 15, 2013 by Annoyingmous

physics induced voltage
A Boeing 747 jet with a wingspan of 60.0 m is flying horizontally at a speed of 287 m/s over Phoenix, Arizona, at a location where the Earth's magnetic field is 50.2 ÁT at 58.0░ below the horizontal. What voltage is generated between the wingtips?
March 29, 2008 by Chris Adison

Physics - Electromagnetism
An inductor in the form of a solenoid contains 440 turns and is 15.8 cm in length. A uniform rate of decrease of current through the inductor of 0.421 A/s induces an emf of 175 ÁV. What is the radius of the solenoid?
August 16, 2012 by Robert

math
The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?
March 11, 2014 by Jacob

math
The voltage (in volts) induced in a coil of wire is v = (2t + 1)0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?
March 12, 2014 by Anonymous

Math
The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?
March 13, 2014 by Anonymous

physics
power supply has an open-circuit voltage of 39.0 V and an internal resistance of 2.00 ┘. It is used to charge two storage batteries connected in series, each having an emf of 5.50 V and internal resistance of 0.300 ┘. The charging current is to be 3.30 A.
March 6, 2012 by Anonymous

physics
A new "D" battery has an emf of 1.5 V. When a wire of negligible resistance is connected between the terminals of the battery, a current of 25 A is produced. Find the internal resistance of the battery. ________ Ω
January 26, 2011 by ali-1

physics
A conducting spherical shell with a total charge of +12.6 micro-coulombs has a point charge of -3.6 micro-coulombs placed at its center. The negative point charge will push the electrons in the spherical shell away from it. This will leave the inner shell with positive charge ...
February 10, 2012 by Mandaleigh

physics
Problem 25.49 A 1.40-m-diameter MRI solenoid with a length of 2.80 m has a magnetic field of 2.50 T along its axis. Part A - If the current is turned off in a time of 1.2 s, what is the emf in one turn of the solenoid's windings? Express your answer using two significant figures
October 9, 2011 by Paige

nursing
A physician orders dolasetron (Anzemet) 1.8 mg/kg IV for prevention of chemotherapy-induced nausea and vomiting. Dolasetron (Anzemet) is available in a 20 mg/mL vial. How many milliliters will be prepared and administered per dose to a 134-lb client? not to sure, please help
March 5, 2013 by linda

PHYSICS HELP
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis
April 8, 2014 by dan

Physics
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis
April 9, 2014 by gary

physics
Several light bulbs, each of resistance 1.5 Ω, are connected in a series across a 120 V source of emf. If the current through the circuit is 2 A, how many light bulbs are there in the circuit?
May 23, 2011 by ashley --- HELP PLEASEE!!!

physics
An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery? 800 Ω 900 Ω 400 Ω 600 Ω
February 24, 2014 by mercedes

physics
what is the difference in the induced current in a wire loop when a magnet goes through the loop north side first, south side first and sideways?
November 11, 2008 by sarah

Chem
Arrange the different types of forces in order of increasing energy. Covelant, Hydrogen bonding, Ion Dipole, Dipole-Dipole, Induced Dipole, and Ionic Bonding
December 4, 2012 by Jay

physics
A 30.343 V emf is placed across a series combination of three resistors (10 Ω, 15.632 Ω, and 64 Ω). At what rate is heat generated in the 15.632 Ω resistor? Answer in units of W
February 24, 2013 by emily

Physics
Two identical capacitors are hooked in series to a 16.6 V emf. If the charge stored on any one of the capacitors is 0.88 micro-Coulombs after the capacitors are fully charged, what is the capacitance of either one of the capacitors?
August 1, 2014 by Xander

physics
Marks: 2 The magnetic field of the loop increases from 0.0 Tesla to 0.2 Tesla in 0.4 seconds. The cross sectional area of the loop is 0.6 m2. What is the average current induced in the loop if the coil has a resistance of 1.5 Ω? Choose one answer. a. 0.1 A b. 0.2 A c. 0....
June 9, 2011 by unknown

coding
what code are assigned for a patient admitted for chemotherapy for an azathioprione. I drug induced aplastic anemia? The patient has peripheral neuropathy of multiple joints of the lower extremities secondary to severe rheumatoid arthritis Code(s) with the POA indicatior
April 29, 2013 by help

Short Circuit Problem (Physics)
Thanks so much for all your help damon! I think this is my last one: h t t p ://img408.imageshack.us/my.php?image=circuit1al8.png The reading of the ammeter is 2 A. The reading of the voltmeter is 33 V. Determine the unknown resistance and emf (picture linked above- remove ...
April 12, 2008 by Eileen

chemistry
The following cell was observed to have an emf of 2.25 volts at 25.0oC : Zn(s) | Zn2+(aq, 0.143 M) || Cl2(g, 0.548 atm) | Cl-(aq, ?M) | Pt(s) . Use tables of standard reduction potentials in Petrucci to calculate the concentration of chloride ion in the cathode compartment, [...
November 30, 2008 by nj

College Physics
When switch S is open, the voltmeter V of the battery reads 3.13 . When the switch is closed, the voltmeter reading drops to 2.90 , and the ammeter A reads 1.70 . Assume that the two meters are ideal, so they do not affect the circuit. emf= V
February 6, 2010 by Lanise

physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.5 m. The magnetic field of the generator is 0.10 T, and the coil rotates at an angular speed of 25 rad/s. What is the peak emf of this generator?
February 15, 2008 by rick

physics
A generator uses a coil that has 280 turns and a 0.45-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. Assuming that each turn of the coil is a square (an approximation), determine the length of the wire from which the coil ...
October 21, 2011 by james

Physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What is the peak emf of this generator? Answer ...
March 17, 2013 by Ashley

Physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What is the peak emf of this generator? Answer ...
March 17, 2013 by Ashley

physics
A flat coil of wire consisting of 56 turns, each with an area of 39 cm^2, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from 3.1 T to 10 T in 5.7 s. If the coil has a total resistance of 0.56 Ω, what ...
April 22, 2013 by Jenna

Chemistry
Select all cases in which the attraction between units in the solid can best be classified as individual atom induced dipole forces. Y2O3 NH3 H2S ZnBr2 Cu KrF4 None I honestly do not know what to do. I know dipole dipole is positive and negative but this question I don't get. ...
January 24, 2010 by Anonymous

Chemistry - Cell Potential
If the cell emf of a Zn-Cu cell is 0.80 V when the concentration of Zn2+ is 2.0M, what is the concentration of Cu2+?
April 26, 2012 by Emerson

Chemistry - Cell Potential
If the cell emf of a Zn-Cu cell is 0.80 V when the concentration of Zn2+ is 2.0M, what is the concentration of Cu2+?
April 26, 2012 by Emerson

Physics
A single conducting loop of wire has an area of 7.4 10-4 m2 and a resistance of 110 Ω. Perpendicular to the plane of the loop is a magnetic field of strength 0.18 T. At what rate (in T/s) must this field change if the induced current in the loop is to be 0.24 A? I really ...
April 7, 2013 by Valerie

Physics
the total resistance is 13.0 kΩ, and the battery's emf is 28.0 V. If the time constant is measured to be 34.0 Ás . Calculate the total capacitance of the circuit. Calculate the time it takes for the voltage across the resistor to reach 11.0 V after the switch is closed. R...
February 29, 2012 by Nade

Chemistry
The electrochemical cell described by the balanced chemical equation has a standard emf (electromotive force) of -0.35 V. Calculate the value (J) for the Wmax that the cell can do under standard conditions. Round your answer to 3 significant figures. 2MnO4-(aq) + Hg22+(aq) &#...
December 3, 2010 by Roger

PHYSICS
A five turn square loop (10 cm on an edge and resistance = 4.0 ohms) is placed in a magnetic field that makes an angle of 30 degrees with the plane of the loop. The magnitude of this field varies with the time according to B = 0.50 t^2, where t is measured in seconds and B in ...
November 11, 2013 by HELP in physics!!!

Chemistry
The voltaic cell described by the cell notation has a standard emf (electromotive force) of 0.94 V. Calculate the value (J) for the maximum electrical work that the cell can do under standard conditions. Round your answer to 3 significant figures. Pt(s) / Br-(aq) / Br2(l) // ...
December 3, 2010 by Roger

Chem
The galvanic cell described by the cell notation has a standard emf (electromotive force) of 4.05 V. Calculate the value (kJ) for the ΔG˚ of the cell. Round your answer to 3 significant figures. Mn(s) l Mn2+(aq) ll F2(g) l F-(aq) l Pt(s) St. Red. Pot. (V) Mn2+/Mn -1....
November 14, 2011 by Jess

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