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Hrishant Goswami Grade: 10
        A capacitor of capacitance 12.0 μF is connected to a battery of emf 6.00 V and internal resistance 1.00 Ω through resistance less leads. 12.0 μs after the connections are made, what will be (a) the current in the circuit, (b) the power delivered by the battery, (c) the power dissipated in heat and (d) the rate at which the energy stored in the capacitor is increasing.
3 years ago

Answers : (1)

Jitender Pal
askIITians Faculty
365 Points
										Sol. C = 12.0 μF = 12 * 10^-6

emf = 6.00 /v, R = 1 Ω
T = 12 μc, i = I base 0 e^-t/RC
= CV/T = e^-t/RC = 12 * 10^-6 * 6/12 * 10^-6 * e^-1
= 2.207 = 2.1 A
b) Power delivered by battery
We known, V = V base 0 e^-t/RC (where V and V base 0 are potential VI)
VI = V base 0l e^-t/RC
⇒ VI = V base 0l * e^-1 = 6 * 6 e^-1 = 13.24 W
c) U = CV^2/T (e^-t/RC)^2 [CV^2/T = energy drawing per unit time]
= 12 * 10^-6 * 36/12 * 10^-6 *(e^-1)^2 = 4.872.
3 years ago
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