A charged capacitor is allowed to discharge through a resistor by c...

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A charged capacitor is allowed to discharge through a resistor by closing the key at the instant \( t=0 \). At
\( \mathrm{P} \) the instant \( t=\ell \mathrm{n} 4 \mu \mathrm{s} \), the reading of the ammeter falls to half of its initial value. The resistance of the W ammeter is equal to
(A) \( 1 \Omega \)
(B) \( 1 \mathrm{k} \Omega \)
(C) \( 2 \Omega \)
(D) \( 2 \mathrm{k} \Omega \)
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