Question

For the circuits shown in the figure I and II, the voltmeter reading would be

• A. $2V$ in circuit I and $0V$ in circuit II
• B. $0V$ in both circuits
• C. $2V$ in both circuits
• D. $0V$ in circuit I and $2V$ in circuit II

Answer 1

The correct option is D $0V$ in circuit I and $2V$ in circuit II

In the Fig I , the key is open so no current flow in the ammeter. Thus the reading of voltmeter will be zero.

In the fig II, the key is closed and the current in the circuit $I=\frac{2}{2}=1A$. Thus the voltmeter reading $=$ voltage across $2\Omega$ =2I=2 V