Question

In the circuit shown, the reading of the voltmeter $V$ is-

• A. $12V$
• B. $8V$
• C. $20V$
• D. $16V$

Answer 1

The correct option is A $12V$

Let us assume voltmeter is ideal:- It means voltmeter has infinite resistance and current will not flow in voltmeter.

$R_{eq}$ in upper branch = $R_{eq}$ in lower branch. So current will get equally divided in both branches.

$V_A-V_B=4\times 1\left(i\right)V_A-V_D=16\times 1\left(ii\right)$

Subtract 2 and 1

$V_B-V_D=12V$

A voltmeter will read 12V