How Do You Calculate Electric Potential at Point P from a Uniformly Charged Rod?

[Adn4n]

The thin, uniformly charged rod shown in the figure has a linear charge density . Find an expression for the electric potential at P. (Use k_e for ke, lambda for , a, b, and L as necessary.)

I'm not sure how to tackle this problem, if anyone could come up with the expression so that I have an answer to work towards to, it'd be greatly appreciated.

 

[chroot]

Do you know calculus?

Find an expression for the potential caused by each "infinitesimal" length dL, and then sum them with an integral.

- Warren