Question

an conductor is placed in uniform electric field with its axis parallel to the field, it experience
a) only a net force
b) neither a net force nor torque
c) both net force and torque
d) only torque

Answer 1

Explanation:

Since dipole is placed in a uniform electric field, so it experiences zero external force.

Also,  dipole is placed to parallel to electric field. 

Angle between   P and E is zero i.e.   θ=0o

Torque    τ=PEsinθ=PE×sin0o=0

Answer 2

Answer:

c) both net force and torque

Explanation:

torque is what causes an angular acceleration.