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At=0 the switch is closed. What is time constant. Find Qmax after the closing of the switch and find the current in the resistor after 10 seconds

Added Fri, 07 Aug '15

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As at t=0 switch is open so initially capacitor is uncharged.So,we use equation of charging of capacitor in an RC Circuit which is:

here =CE where c is the capacitance= and e=battery potential =24 v (according to given question)

and T=time constant =RC i.e. product of resistance and capacitance = 54micro seconds (according to given question)

so maximum charge==144 micro coulomb.

current in the circuit after t seconds is given by following equation

=2.66*e^(-10/.000054)=0A as the capacitor is fully charged.

Added Fri, 07 Aug '15

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