At time \( \mathrm{t}=0 \), a battery of \( 10 \mathrm{~V} \) is connected across points \( \mat...

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At time \( \mathrm{t}=0 \), a battery of \( 10 \mathrm{~V} \) is connected across points \( \mathrm{A} \) and \( \mathrm{B} \) in the given circuit. If the capacitors have no charge initially, at what time (in seconds) does the voltage across them become \( 4 \mathrm{~V} \) ?
\( \mathrm{P} \) [Take : \( \ln 5=1.6, \ln 3=1.1 \) ]
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