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# A sample of HCI gas is placed in an electric field of 2.5 × 104 NC−1. The dipole moment of each HCI molecule is 3.4 × 10−30 Cm. Find the maximum torque that can act on a molecule. - Physics

Numerical

A sample of HCI gas is placed in an electric field of 2.5 × 104 NC−1. The dipole moment of each HCI molecule is 3.4 × 10−30 Cm. Find the maximum torque that can act on a molecule.

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#### Solution

Given:
Electric field intensity, E = 2.5 × 104 NC−1
Dipole moment of an HCl molecule, P = 3.4 × 10−30 Cm
Torque on the molecule,

$\Gamma = PE\sin\theta$

For

$\Gamma_{max}$ , putting sinθ = 1, we get
$\Gamma_{max} = PE$

$= 3 . 4 \times {10}^{- 30} 2 . 5 \times {10}^4$

$= 8 . 5 \times {10}^{- 26}$  Nm

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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 7 Electric Field and Potential
Q 70 | Page 124
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