Saved Bookmarks
| 1. |
A spherical conductor of radius 12 cm has a charge of 1.6 xx 10^(-7) C distributed uniformly on its surface . What is the electric field (a) inside the sphere (b) just outside the sphere. (c) at a point 18 cm from the centre of the sphere ? |
|
Answer» Solution :(a) Electric field inside a spherical is ZERO. (b) Electric CHARGE on the surface of sphere can be considered as on the centre of sphere . Electric field at a point r (`gt`R) from the centre of sphere is, E(r) = `(kq)/(r^(2)) ` `= (9xx10^(9)xx1.6xx10^(-7))/((0.12)^(2))` `= 10^(5) NC^(-1)` (c ) Electric field at a point x = 18 cm from the centre of the sphere is, `E (18) = (kq)/(x^(2))` `= (9xx10^(9)xx1.6xx10^(-7))/((0.18)^(2))` `= 444xx10^(2)` `= 4.44 xx10^(4) NC^(-1)` |
|