An electric dipole consists of charges plusminus500 mu C sep

An electric dipole consists of charges plusminus5.00 mu C separated by 1.20 mm. It is placed in a vertical electric field of magnitude 525 N/C oriented as shown in the figure. The magnitude of the net torque this field exerts on the dipole is closet to

Solution

Magnitude of the torque on a dipole is expressed as,

T= pE sin (Phi)

=(qd)Esin (Phi)

Substitute the values:

T= (5*10^-6 C)(1.20*10^-3 m)(525 N/C) sin140

   =2.02*10^-6 N.m