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12th ICSE
IMPORTANT
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A variable air capacitor has n plates each of area A metre2 and the distance between two successive plates is d. Compute its capacitance.

Important Questions on Capacitors and Dielectrics

MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 14
In a parallel-plate capacitor, the capacitance increases from 4μF to 80μF on introducing a dielectric medium between the plates. What is the dielectric constant (or relative permittivity) of the medium?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 15
Will a dielectric-filled capacitor store more charge or less charge than a similar air capacitor at the same potential difference?
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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 16
Will a dielectric-filled capacitor have a higher PD or lower PD between its plates than an air-filled capacitor having the same amount of charge?
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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 17
How is dielectric constant (or relative permittivity of a dielectric) expressed in terms of capacitance?
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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 18
What may be a possible reason of water having a much greater dielectric constant (=80) than say mica (=6)?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 19
What is the effect of temperature on the dielectric constant K of a dielectric?
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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 20
A parallel plate air capacitor has a capacitance of 5μF. It becomes 50μF when a dielectric medium occupies the entire space between its two plates. What is the dielectric constant of the medium?
MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 21
The capacitance of a charged conductor is C farad and its potential energy due to the charge is U. Write down the expression for the charge on the conductor.