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
\( \mathrm{P} \)
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 value of current \( I_{1} \) is
(A) \( \frac{1}{10} \mathrm{~A} \)
(B) \( \frac{1}{20} \mathrm{~A} \)
(C) \( \frac{1}{30} \mathrm{~A} \)
(D) \( \frac{1}{40} \mathrm{~A} \)


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