What is the emf of the battery?
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Q: Explain the difference between potential difference and emf?
A: Expression of Electromotive force - E=WQWhere, E =Electromotive force W =Work done Q =Charge…
Q: 12. In a potentiometer arrangement, a cell of emf 1.25V gives a balance point at 35.0cm length of…
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A: Given a cell of emf 2.5 V Driver cell voltage 2 V Length of potentiometer 100 cm
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Q: A 1.45 kW hair dryer is connected to a 120 V line. The peak current going through the hair dryer is…
A: Power (p)=1.45 kW AC line Voltage (v)=120 V
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Q: he motor in a toy car is powered by four batteries in series, which produce a total emf of 7.4 V.…
A: Number of batteries = 4Total emf = 7.4 volts Current = 2.9 A Back emf = 2.1 V internal resistance of…
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A: The unknown voltage indicated in the picture.
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A: GivenI=4100 Ampered=4 cmR(per meter)=2.5×10-5 ohm per meterLet V be the potential difference.
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Q: maximum power transfer
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Q: What is the power rating of the hair dryer in watts? [Select] Depending on the application, the time…
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Q: In a potentiometer arrangement, a cell of emf 1.25 V gives a balance point at 35.0 cm length of the…
A: The balance condition can be written as,
Q: The motor in a toy car is powered by four batteries in series, which produce a total emf of 6.00 V.…
A: Formula of current passing through the circuit is as follows: I=Vs-VbR-r…
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Q: 1.71 kW hair dryer is connected to a 120 V line. The peak current going through the hair dryer is A.…
A: Power of Hair dryer P = 1.71 kW Voltage applied V = 120 V We…
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A: Given data: Two heating coils are connected across the power supply Supply voltage (V) = 100 V…
Q: In the figure R₁-10.3 k0, R₂-14.9k0.C-0.376 μF, and the ideal battery has emf = 20.0 V. First, the…
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Q: An ideal battery has an emf of 150V on the left side and a second emf on the right side of 50V. If…
A: We have to use Kirchhoff voltage law
Q: The motor in a toy car is powered by four batteries in series, which produce a total emf of 5.20 V.…
A: Given data: Number of batteries are, N=4. Total emf is, E=5.20 V. Current withdrawn by motor is,…
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Q: ww R₁ R₂ ww R₁ 1Ω R2 ΖΩ R3 R4 4Ω R5 = 50 5Ω I = 1A - = = = www 3Ω R₁ www R₂ E www RA irchhoff's…
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Q: alculate the power in the 6 kOhm resistor
A: Given data, Voltage of the battery = 80V
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A: To answer: The cost to leave 25 W porch light on day and night for a year.
Q: A car battery has ε = 12 V. When the car’s starter motor is running, the battery current is 320 A.…
A: The expression for power, P=VI
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A: Given: A solar panel produces a current of 8.65 A at a potential difference of 148 V. The…
Q: What is the power in watts of a 2.05 X 102 MV lightning bolt having a current of 1.73 X 104 A?
A: Given that:- Lightning bolt having potential, V=2.05×102MV=2.05×108 VoltCurrent, I=1.73×104A
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Q: 5. This problem is about charging a weak battery &, = 10.8 V with a good battery &,₁ = 12.0 V. Let…
A: Given: ε1=10.8 Vε2=12 Vr1=r20.02 ΩR=0.2 Ω
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