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  4. What will be current through the 200 Ω resistor in the given circuit a long time after the switch ‘K’ is made on ?

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Q. What will be current through the $200 \, \Omega$ resistor in the given circuit a long time after the switch ‘K’ is made on ?Physics Question Image

WBJEEWBJEE 2018Current Electricity

Solution:

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In steady state, arm having capacitors does not flow current. So, we can neglect them
$\therefore $ The given circuit reduce to
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$\therefore R_{net} = 200 + 400 = 600\,\Omega$
$\therefore $ Current in circuit,
$I = \frac{V}{R} = \frac{6}{600} = 0.01\,A$
$ = 10\,mA$