Question

A dipole is placed in a uniform electric field with its axis parallel to the field. It
experiences ________(a) Only a net force(b) Only a torque(c) Both a net force and torque(d) Neither a net force nor a torque

Answer 1

Answer :- option (a) only a net force

Explanation :- A dipole is placed in a uniform electric field with its axis parallel to the field , means angle between dipole moment and electric field is zero.
we know, torque, τ = E × P
Magnitude of torque, |τ| = PE sinθ
Here, θ = 0° so, |τ| = 0
Hence, it doesn't experience torque.

Force ≠ 0 because dipole contains two opposite nature charges , so, electric force act on both the given charges will be same in directions. due to this reason , F ≠ 0
Hence, it experiences force .

So, A dipole is palced in a uniform electric field with its axis parallel to it . It experiences only a net force. Hence, option (a) is correct

Answer 2

Explanation:

Option (a) only a net force

is the correct answer