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 ?, and ?. Choose the correct option.

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Solution

Q.
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. [2024]

1 $V_{1} = V_{2}$

2 $V_{1} \neq V_{3} - V_{2}$

3 $V_{1} + V_{2} > V_{3}$

4 $V_{1} + V_{2} = V_{3}$

Ans.
(4)

From $KVL, V_{1} + V_{2} - V_{3} = 0 \Rightarrow V_{1} + V_{2} = V_{3}$

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