Question

10. The maximum charge that can be given to a conducting sphere of radius 3 m when kept in air is (1) 3 nc 2 3 uc 3) 3 mc (4 30​

Answer 1

Answer:

Considering that the charge is Q. The dielectric strength of air is given. The maximum charge which can be given without ionising the air around it is given by,

E=kQ/r

2

3×10

6

=9×10

9

×Q/4

Q=1.33×10

−3

C