Question

Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across A and B, their readings are $V_1$, $V_2$ and $V_3$.

Choose the correct option.

• A. $V_1 = V_2$
• B. $V_1 \neq V_3 - V_2$
• C. $V_1 + V_2 > V_3$
• D. $V_1 + V_2 = V_3$

Answer 1

Answer: (D)

$V_1 + V_2 = V_3$

Answer 2

Applying Kirchhoff’s Voltage Law (KVL) across the loop: $V_1 + V_2 - V_3 = 0 \implies V_1 + V_2 = V_3.$

The Correct answer is: $V_1 + V_2 = V_3$