Question

A solid metallic sphere is placed in a uniform electric field. Which of the curves shown in figure represent the lines of force correctly?

• A. $\left(b\right)$
• B. $\left(c\right)$
• C. $\left(a\right)$
• D. $\left(d\right)$

Answer 1

Answer: (D)

Consider a Gaussian surface inside the metallic sphere. The charge enclosed by the Gaussian surface is zero (since metallic sphere is a conductor and charge lies only on the surface). Therefore, electric flux is zero.
Now, Electric Flux = Electric Field * Area
but area cannot be zero. Therefore Electric field inside the sphere is zero.