Question

The minimum field required to produce breakdown of air is 3 X 10^6 V / m. Therefore a conducting sphere 10 cm in radius can easily hold a charge of 4X 10^-6 C in air without breakdown. *
True
False

Answer 1

Answer:

man electric field when ν change is

given occurs at the surface ∴e E=

r

2

kν

∴ for breakdown not to occur

r

2

kq

=3×10

−6

ν=

4×10

4

3×10

−6

×10

−6

ν=0.33×10

−9

c

ν= 0.33n c