Question

two charges Q1 and Q2 are placed in air at distance 30cm then find the distance in medium of dielectric constant 9.such that force between the charges remain same?​

Answer 1

Answer:

when dielectric is added ε

0

becomes kε

0

where k is dielectric constant

we known F

i

=

4π ε

0

1

r

2

Q

1

Q

2

when dielectric is added f

f

=

4π kε

0

1

r

2

Q

1

Q

2

∴F

f

=

2

5

=2⋅5 units