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When the key K is pressed at time t 0, ...

When the key K 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?

A

I = 1 mA at all t

B

I = 2 mA at all t

C

I oscillates between 1 mA and 2 mA

D

at t = 0, I = 2 mA and with time, it goes to 1 mA

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