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IMPORTANT
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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?

Important Questions on Capacitors and Dielectrics

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
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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
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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?
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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.
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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 22
Two copper spheres of equal radii, one hollow and the other solid are charged to the same potential. Which one does carry more charge?