What can lisa do to increase the strength of the electromagnet? she can use a nail with weaker magnetic properties. she can change the direction of the nail. she can move the wire loops closer together. she can reduce the number of wire loops.

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)