Describe what will happen to the hiker’s gravitational potential energy if he started carrying his friend’s backpack the rest of the way up the hill.

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.

e/c, where e is its total energy