A parallel-plate capacitor having vacuum between the plates has capacitance C. What will be the capacitance When the distance d between the plates is doubled.

Important Questions on Capacitors and Dielectrics

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 8

A parallel-plate capacitor having vacuum between the plates has capacitance C. What will be the capacitance When a sheet of thickness t and dielectric constant K is placed between the plates? (Assume r = d.)

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 9

What do you mean by a dielectric? Which one out of germanium, mica and carbon is a dielectric?

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 10

Name a few dielectrics commonly used in capacitors.

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 11

Explain how the introduction of a dielectric slab between the plates of a capacitor decreases the electric field (and potential difference) between the plates, and increases the capacitance.

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 12

If the dielectric medium is a solid substance then is there any other advantage of it in addition to an increase in the capacitance?

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 13

The atmospheric electric field on earth is as high as

100 {Vm}^{- 1}

. Why do we not get an electric shock as we move on earth?

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 14

Suppose a man places an insulating slab on the ground and puts a large aluminium sheet on its top. Will he get an electric shock if he touches the aluminium sheet next morning?

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 4 - Capacitors and Dielectrics>QUESTIONS>Q 15

Show that the units