Question

Figure shows electric field lines in which an electric dipole $\overrightarrow{P}$ is placed as shown.
Which of the following statements is correct?

• A. The dipole will not experience any force
• B. The dipole will experience a force towards right
• C. The dipole will experience a force towards left
• D. The dipole will experience a force upwards

Answer 1

Answer: (C)

The spacing between electric lines of force increases from left to right. It means that the electric field intensity $E$ on left is greater than the electric field intensity $E$ on right.

So, the force on $+q$ charge of the dipole is smaller and to the right. Force on $-q$ charge of the dipole is bigger and to the left due to variable electric field. Hence the dipole will experience force towards the left.