When the key is pressed at time t = 0 then which of the following statement about the current i in the resistor AB of the given circuit is true:

At t = 0, i = 2 mA and with time it goes to 1 mA

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i oscillates between 1 mA and 2 mA

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i = 2 mA at all t

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i = 1 mA at all t

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Solution

The correct option is A At t = 0, i = 2 mA and with time it goes to 1 mA
At t = 0
$I = \frac{V}{R} = \frac{2}{1000} = 2$ mA
At steady state, resistance of capacitor is infinity
$I = \frac{V}{R} = \frac{2}{1000 + 1000} = 1$ mA

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When the key is pressed at time t = 0 then which of the following statement about the current i in the resistor AB of the given circuit is true:

The correct option is A At t = 0, i = 2 mA and with time it goes to 1 mAAt t = 0 I=VR=21000=2mAAt steady state, resistance of capacitor is infinityI=VR=21000+1000=1mA

The correct option is A At t = 0, i = 2 mA and with time it goes to 1 mA
At t = 0
$I = \frac{V}{R} = \frac{2}{1000} = 2$ mA
At steady state, resistance of capacitor is infinity
$I = \frac{V}{R} = \frac{2}{1000 + 1000} = 1$ mA