## Question:

An electric dipole consists of two opposite charges, each of magnitude 1.0μC separated by a distance of 2.0 cm. The dipole is placed in an external electric field of 10^5 N/C. The maximum torque on the dipole is:

### Options:

## Options:

(A) point charge.

(B) Infinite uniform line charge

(C) uniformly charged infinite plane.

(D) uniformly charged spherical shell.

## Answer:

## Answer:

(C) uniformly charged infinite plane.

The **uniformly charged infinite plane** or **parallel **configuration produces a uniform electric field.

## Solution:

**Given:**

q (charges magnitude in Coulomb) = 10^{-6} C

d (Distance between charges in Meter) = 2 × 10^{-2} m.

E (electric field) = 10^{5} N/C

**Calculations:**

p = q × d = 10^{-6} × (2 × 10^{-2})

= 2 × 10^{-8} Cm.

Τ_{max }= pE = (2 × 10^{-8} )× 10^{5}

= 2 × 10^{-3} Nm

Here option (C) is correct which is 2 × 10^{-3} N-m.