An electrical circuit is shown in figure. The values of resistances and the currents are shown. ....

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An electrical circuit is shown in figure. The values of resistances and the currents are shown. A voltmeter of resistance \( 400 \Omega \) is connected across the \( 400 \Omega \) resistor. The battery has negligible internal resistance.
The reading of the voltmeter is:
(A) \( \frac{10}{3} \mathrm{~V} \)
(B) \( 5 \mathrm{~V} \)
(C) \( \frac{20}{3} \mathrm{~V} \)
(D) \( 4 \mathrm{~V} \)


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