Which of the following is the main difference between electromagnets and bar magnets...? Mcqs

Which of the following is the main difference between electromagnets and bar magnets...?

(A) Electromagnets are stronger than bar magnets

(B) Bar magnets are permanent, but electromagnets are temporary

(C) Electromagnets are used in motors, but bar magnets are used in generators

(D) Electromagnets need electricity but bar magnets do not need electricity