Question

अंक 3+1 शब्दसीमा 75-150
The capacitance of a parallel plate capacitor having air between its plates is 10 uf if
the distance between the plates is reduced to half and the medium between plates is
replaced by a medium of dielectric constant k=5, then find the value how much
increase or decrease will be there in the capacitance of the capacitor.​

Answer 1

Answer:

hope it will help you

Explanation:

Such a configuration can be thought of as a parallel combination of two capacitors- one with area A/2 and dielectric and another with same area and without dielectric.

C

1

=

2d

ϵ

0

A

; (for air in between)

In second case k=4

C

2

=

2d

4ϵ

0

A

=

d

2ϵ

0

A

Hence, effective capacitance is C=C

1

+C

2

=2.5

d

ϵ

0

A

=2.5C

0

=25 μF