Electric Charges and Fields - Result Question 25
25. If a dipole of dipole moment is placed in a uniform electric field , then torque acting on it is given by
[2001]
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 25. (b)
Solution:
- (b) Given : Dipole moment of the dipole
and uniform electric field . We know that dipole moment (where is the charge and is dipole length). And when a dipole of dipole moment is placed in a uniform electric field , then Torque Either force Perpendicular distance between the two forces or or (vector form)