Questions
When the key K is pressed at time t = 0 which of the following statements about the current I in the resistor AB of the given circuit is true?
a
I = 2 mA at all t
b
I oscillates between 1 mA and 2 mA
c
I = 1 mA at all t
d
At t = 0, I= 2 mA and with time it goes to 1 mA
detailed solution
Correct option is D
Initially the capacitor acts as short-circuited and finally open-circuit.Talk to our academic expert!
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A copper wire of cross-sectional area 2.0 mm2 , resistivity , carries a current of 1 A. The electric field in the copper wire is
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