1.
Which property of a magnet is used in an electric motor?
A
Attraction between like poles
B
Force on a current-carrying conductor in a magnetic field
C
Magnetic induction
D
Self-inductance
Answer and explanation
Correct Answer: B — Force on a current-carrying conductor in a magnetic field
Electric motors work on the principle that a current-carrying conductor placed in a magnetic field experiences a force (Fleming's left-hand rule).