Question

A non-conducting sphere of radius a has a net charge $+q$ uniformly distributed throughout its volume. A spherical conducting shell having inner and outer, radii b and c and a net charge $-q$ is concentric with the sphere (see the figure). Read the following statements (i) The electric field at a distance $r$ from the center of the sphere = $\frac{1}{4\pi \epsilon_o} \frac {qr}{a^3} for\, r < a$ (ii) The electric field at distance $r$ from the center of the sphere for $a < r < b = 0$ (iii) The electric field at distance $r$ from the center of the sphere for $b < r < c < = 0$ (iv) The charge on the inner surface of the hollow sphere = $-q$ (v) The charge on the outer surface of the hollow sphere = $+q$.

• A. (i) (ii) and (v)
• B. (i), (iii) and (iv)
• C. (ii), (iii) and (iv)
• D. (ii), (iii) and (v)

Answer 1

Answer: (D)

(ii), (iii) and (v)

Answer 2

Radius $= a$