Which of the following phrases best describes the term impedance?

By John

A. Magnetism that remains in the core of an electromagnet after the current through the coil is turned off

B. The force of attraction between the poles of a permanent and temporary magnetic field

C. The amount of magnetic flux that is not confined to the core material of an electromagnet

D. The circular magnetic field that surrounds a conductor carrying a current

E. None of the above

Answer: Option A