An electric dipole, made up of positive and negative charges each of 
and placed at a distance 4.2 cm apart is placed in an electric field of 
. What will be the maximum torque which the field can exert on the dipole? Also, obtain the work that must be done to turn the dipole from 
to 
.
Text Solution
Verified by ExpertsA
Given, 
and 
When a dipole is placed in an electric field E, torque exerted, 
, where p = dipole moment 
and θ is the angle which dipole makes with the field.
For maximum torque, 
Work done in rotating the dipole from an angle 
to 
,
Hence, the maximum torque is 
and work done is 
.
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