|
The figure above shows a semicircular arc of radius R, with point P at its center. A total charge Q is uniformly distributed over this arc.
a: What is the potential V at point P?
b: Can you find the electric field at P by using the potential V obtained in a and taking its gradient? If you can, what is the answer? If not, why not?
|
Once you're done, click here to learn how to deal with two equal point charges.