Which law states that absolute zero cannot be reached?
a) second law of thermodynamics
b) first law of thermodynamics
c) third law of thermodynamics

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.