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AP® Physics 1 & 2

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Battery Voltage

APPH12-SEQWIZ

Two resistors are connected to a battery as shown below.

  • The resistance of the first resistor is 9.0 ohms (${R}_{1}=\text{9.0}\text{ }\Omega$).
  • Energy is dissipated by the the second resistor at the rate of 32 Joules/second (${P}_{2}$=32 Watts).
  • Charge flows in the wire between resistor 1 and resistor 2 at the rate of 2.0 Coulombs/second ($I=$2.0 Amps).

What is the emf supplied by the battery (${V}_{B}$= ____)?

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A

21 V

B

34 V

C

41 V

D

73 V