The figure shows a RC circuit with a parallel plate capacitor, before switching on the circuit plate A of the capacitor has a charge – Q 0 , while plate B has no net charge. Now at t = 0, the circuit is switched on. How much time (in second) will elapse before the net charge on plate A becomes zero. (Given C = 1 µF, Q 0 = 1 mC, E = 1000 V and R = 
Ω ).
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(2)
At any time t charge q flow from plate B to plate A
Kirchoff's law
iR + 
– E = 0
R + 
– E = 0
R. 
= 
+ E ⇒ 
t = RC log e 
putting the value of
C, Q 0 , E and R we get t = 2sec.
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