Question

A 12–volt storage battery, with an internal resistance of 2Ω, is being charged by a current of 2 amperes as shown in the diagram above. Under these circumstances, a voltmeter connected across the terminals of the battery will read

(A) 4 V 

(B) 8 V 

(C) 10 V 

(D) 12 V 

(E) 16 V

Answer 1

The correct option is: (E) 16 V

Explanation:

Summing the potential differences from left to right gives V_T = –12 V – (2 A)(2 Ω) = – 16 V. It is possible for V_T > ℰ.