JEE MAIN - Physics (2024 - 27th January Evening Shift - No. 12)
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.
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$$V_1=V_2$$
$$V_1 \neq V_3-V_2$$
$$V_1+V_2=V_3$$
$$V_1+V_2>V_3$$
Explanation
From KVL,
$$\mathbf{V}_{\mathbf{1}}+\mathbf{V}_{\mathbf{2}}-\mathbf{V}_{\mathbf{3}}=\mathbf{0} \Rightarrow \mathrm{V}_1+\mathrm{V}_2=\mathrm{V}_3$$
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