Question

In the following circuit reading of voltmeter V is

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

Answer 1

Answer: (A)

12 V

Answer 2

P.d. between X and Y is V_XY = V_X – V_Y = 1 × 4 = 4 V. (i)

and p.d. between X and Z is V_XZ = V_X – V_Z = 1 × 16 = 16 V …. (ii)

On solving equations (i) and (ii) we get potential difference between Y and Z i.e., reading of voltmeter is $V_{Y} - V_{Z} = 12V$