Question

Dielectric strength of air 3x10 Vm". Suppose the radius of a hollow sphere min the Van de Graff generator is R=0.5m, calculate the minimum potential difference created by this Van de Graff generator.​

Answer 1

Answer:

Potential difference, V=15×10

6

V

Dielectric strength of the surrounding gas = 5 × 10

7

V/m

Electric field intensity, E= Dielectric strength = 5 × 10

7

V/m

Minimum radius of the spherical shell required for the purpose is given by,

r=

E

V

=

5×10

7

15×10

6

=0.3m

Hence, the minimum radius of the spherical shell required is 30 cm.

Answer 2

Answer:

Dielectric strength of air 3x10 Vm".

Suppose the radius of a hollow sphere min the Van de Graff generator is R=0.5m,