The potential along the equatorial line of a dipole is 0. How can there be an electric field on the equatorial line?

Asked by Ann Liza Tharakan | 28th Jun, 2013, 07:47: PM

Expert Answer:

This is because potential is defined as 
 
V = integral of (E.dl) 
 
Now, for the V = 0, it is not necessary that E needs to be 0. What can happen is that since both E and dl are vector quantities, their dot product can be equal to 0, resulting in V =0. This is what happens, E usually has the direction parallel to the axis of the dipole which is perpendicular to the equatorial line on which you would be moving. So, dl and E are perpendicular, resulting in V =0. 

Answered by  | 29th Jun, 2013, 11:54: PM

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