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A resistor with resistance 10MOmega is c...

A resistor with resistance `10MOmega` is connected in series with a capacitot of capcitance `1.0muF` and a battery with emf 12.0V, Before the switch is closed at time t= 0 the capacitor is uncharged.
a. What is the time constant?
b. What fraction of the final charge is on the plates at tiem t = 46s?
c. kWhat fraction of the inital current remians at t =46?

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