question_answer

In the circuit shown below,   The reading of the voltmeter V is                                                    [MP PET 2003]

A)         12 V

B)         8 V

C)         20 V

D)         16 V

Correct Answer: A

Solution :

                                         In the following circuit potential difference between C and A is \[{{V}_{C}}-{{V}_{A}}=1\times 4=4\]   ??(i) C and B is \[{{V}_{C}}-{{V}_{B}}=1\times 16=16\]  ??(ii) On solving equations (i) and (ii) we get                                                    \[{{V}_{A}}-{{V}_{B}}=12V\].