Which of the following statement is not correct in respect of electric motor
(A) Direction of the current through the coil is reversed every half rotation
(B) A current carrying coil rotates when it is kept in uniform magnetic filed
(C) Electric energy is converted in to mechanical energy
(D) None of these
Answers
The incorrect statement in respect of electric motor is:
(D) None of these
- The direction of electric current through the coil is reversed every half rotation by the use of commutators and brushes.
- In an electric motor, the coil rotates when it is kept inside a uniform magnetic filed and a current is flown through it.
- An electric motor converts the electric energy into mechanical energy.
- Since all these statements are correct regarding an electric motor, hence, the correct answer is option (D) None of these.
(D) None of these
Explanation:
(A) Direction of the current through the coil is reversed every half rotation - True
(B) A current carrying coil rotates when it is kept in uniform magnetic filed - True
(C) Electric energy is converted in to mechanical energy - True
(D) None of these - False.
The statements A, B and C are correct with respect to electric motors. So none of these is the incorrect statement.
Option D is the answer.