an electric dipole of length 2 cm is placed with its Axis making an angle of 30° to uniform electric field 10^5 N/C . If it experiences a torque of 10^3 N m then the potential energy of the dipole is
a) -10 J
b) -20 J
c) -30 J
d) -40 J
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B) - 30J is the potential energy of this dipole
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