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IMPORTANT
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In the circuit shown below the switch is closed at t=0. For 0<t<R(C1+C2), the current I1 in the capacitor C1 in terms of total current I is

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Important Questions on Capacitance

EASY
JEE Main/Advance
IMPORTANT

A capacitor of capacitance C is charged to a potential difference V0. The charging battery is disconnected and the capacitor is connected to a capacitor of unknown capacitance CX. The potential difference across the combination is V. The value of Cx should be

 

HARD
JEE Main/Advance
IMPORTANT

The charge on each of the capacitors 0.16 m s after the switch S is closed in figure is:

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JEE Main/Advance
IMPORTANT

The switch S shown in figure is kept closed for a long time and then opened at t=0, then the current in the middle 20 Î© resistor at t=0.25 ms is

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EASY
JEE Main/Advance
IMPORTANT

The distance between the plates of a parallel plate condenser is d. If a copper plate of the same area but thickness d2 is placed between the plates then the new capacitance will become

MEDIUM
JEE Main/Advance
IMPORTANT
On placing a dielectric slab between the plates of an isolated charged condenser its
MEDIUM
JEE Main/Advance
IMPORTANT

The effective capacitance of the system in adjoining figure will be,

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JEE Main/Advance
IMPORTANT

In the adjoining diagram, two geometrically identical capacitors A and B are connected to a battery. Air is filled between the plates of C1 and a dielectric is filled between the plates of C2, then

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JEE Main/Advance
IMPORTANT
A parallel plate condenser is connected to a battery of emf 4 volt. If a plate of dielectric constant 8 is inserted into it, then the potential difference on the condenser will be