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Discharging of Capacitors

While chargin...

Question

While charging/discharging a capacitor, there are charges moving towards/away from the capacitor which ensures current flow in a circuit.

A

False

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B

True

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Solution

The correct option is B True

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Q. A capacitor C₁of capacitance 1 μF and a capacitor C₂of capacitance 2 μF are separately charged by a common battery for a long time. The two capacitors are then separately discharged through equal resistors. Both the discharge circuits are connected at t = 0.
(a) The current in each of the two discharging circuits is zero at t = 0.
(b) The currents in the two discharging circuits at t = 0 are equal but not zero.
(c) The currents in the two discharging circuits at t = 0 are unequal.
(d) C₁ loses 50% of its initial charge sooner than C₂ loses 50% of its initial charge.

C_{1}

1 μ F

C_{2}

2 μ F

are separately charged fully by a common battery. The two capacitors are then separately allowed to discharge through equal resistors at time

t = 0

Q. Two identical capacitors are connected as shown and having initial charge

Q_{0}

. Separation between plates of each capacitor is

d_{0}

. Suddenly, the left plate of upper capacitor and right plate of lower capacitor starts moving with speed

v

towards left while other plate of each capacitor remains fixed.
(given

\frac{Q_{0} V}{2 d_{0}} = 10 A

). The value of current (in

A

) in the circuit is

Q. The instantaneous charges on capacitor in two discharging

R C

circuits are plotted with respect to time as shown in figure below. Choose the correct statement(s) (where

E_{1}

E_{2}

are emfs of two DC sources in two different charging circuits and capacitors are fully charged initially).

Q. During charging and discharging of a capacitor:-

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