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Two parallel plates have charges Q1 and Q2 on them and the capacitance is C. The potential difference between them is

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Important Questions on Electrostatic Potential and Capacitance

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 47
In a spherical capacitor with plate radii a and b, the potential difference between the plates is V. The electric field between the plates at a radial distance r from centre is
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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 48
In a cylindrical capacitor with plate radii a and b, the potential difference between the plates is V. The electric field between the plates at a radial distance r from axis is
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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 49
Two parallel plates have area A and separation d. They are given charges q1 and q2. They repel each other by a force
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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 50

The heat generated in the circuit after closing the switch is

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 51
A parallel plate capacitor is charged by a battery of emf V volts. Work done by battery is W. Gain in energy of capacitor is U and heat dissipated in lead wires is H. Then
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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 52
A capacitor of capacitance C is charged to a potential difference V from a cell and then disconnected from it. A charge +Q is now given to its positive plate. The potential difference across the capacitor is now
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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 53
A charge of 1μC is given to one plate of a parallel plate capacitor of capacitance 0.1μF and a charge of 2μC is given to the other plate. Find the potential difference developed between the plates.
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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 54
A parallel plate air capacitor is to be constructed which can store 12μC of charge when operated at 1200 V. If dielectric strength of air is 3×106 V m-1, the minimum plate area of the capacitor required is