A sample of HCl gas is placed in an electric field of 2.5×104N/C. The dipole moment of each HCl molecule is 3.4×10−30C-m. Find the maximum torque that can act on a molecule.
A
6.5×10−26N-m
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B
7.5×10−26N-m
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C
8.5×10−26N-m
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D
9.5×10−26N-m
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Solution
The correct option is C8.5×10−26N-m Given:
Magnitude of electric field, E=2.5×104N/C;
Magnitude of dipole moment, p=3.4×10−30cm
And magnitude of torque on electric dipole placed in uniform electric field is given by