Acapacitor stores 7.6 x 10^-11 c when the electric potential difference between the plates is 5.8 v. what is the electric potential energy in the capacitor

Use the formula for energy stored between the plates of a capacitor:

where Q is he charge (given) and U is the electric potential (aka voltage), given.

The stored energy is 2.2 10^{-10} Joules.

the answer is b ) square root of 5

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.