DC motor Quiz Practice Quiz | DC motor

Q: What is the primary function of a DC motor?

To convert electrical energy into mechanical energy. — DC motors are designed to use electricity to create rotational force.

Q: Which of the following components is NOT a main part of a DC motor?

Transformer — Transformers are used in AC circuits, not DC motors. The rest are essential parts.

Q: What is the purpose of the commutator in a DC motor?

To reverse the current direction in the armature winding. — The commutator ensures continuous torque by switching current polarity.

Q: In a DC motor, what determines the direction of rotation?

The direction of current flow through the armature or the field winding. — Reversing current flow in either armature or field reverses the rotation direction.

Q: What is the relationship between the back EMF (Electromotive Force) and the applied voltage in a DC motor?

Back EMF is less than the applied voltage and opposes it. — Back EMF is induced in the armature and opposes the applied voltage, limiting current.

Question 1 of 5

What is the primary function of a DC motor?

DC motors are designed to use electricity to create rotational force.

Question 2 of 5

Which of the following components is NOT a main part of a DC motor?

Transformers are used in AC circuits, not DC motors. The rest are essential parts.

Question 3 of 5

What is the purpose of the commutator in a DC motor?

The commutator ensures continuous torque by switching current polarity.

Question 4 of 5

In a DC motor, what determines the direction of rotation?

Reversing current flow in either armature or field reverses the rotation direction.

Question 5 of 5

What is the relationship between the back EMF (Electromotive Force) and the applied voltage in a DC motor?

Back EMF is induced in the armature and opposes the applied voltage, limiting current.

DC motor Quiz