AP® Physics 1 & 2

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Moderate

This Battery Has Potential

APPH12-BO$DL3

The circuit shown below consists of a battery of negligible internal resistance and two resistors,
(${R}_{1}\text{ and } {R}_{2}=25 \text{ Ohms}$). The resistance of the connecting wires is also negligible.

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  • The current leaving point X and going into the upper 'branch' (containing ${R}_{1}$) is $0.50\text{ Amps}$.
  • The current leaving point Y in the circuit is $0.80\text{ Amps}$.

Which of the following is closest to the $emf$ of the battery?

A

$7.5\text{ V}$

B

$13\text{ V}$

C

$20\text{ V}$

D

$33\text{ V}$