DC motor working principal Quiz Practice Quiz | DC…

Q: What fundamental principle governs the operation of a DC motor?

The interaction between a magnetic field and a current-carrying conductor. — DC motors work on the principle of a force experienced by a current-carrying conductor in a magnetic field.

Q: Which component in a DC motor is responsible for reversing the current flow in the armature winding?

The commutator. — The commutator ensures the torque produced is always in the same direction by reversing current direction periodically.

Q: What is the function of the field winding in a DC motor?

To create a magnetic field that interacts with the armature current. — The field winding generates the magnetic field essential for torque production. The armature current interacts with it.

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

Back EMF opposes the applied voltage. — Back EMF is generated by the rotating armature and opposes the applied voltage, regulating armature current.

Q: How can the speed of a DC motor be controlled?

By changing the field strength or the armature voltage. — Speed control can be achieved by varying the armature voltage or the magnetic field strength of the field winding.

Question 1 of 5

What fundamental principle governs the operation of a DC motor?

DC motors work on the principle of a force experienced by a current-carrying conductor in a magnetic field.

Question 2 of 5

Which component in a DC motor is responsible for reversing the current flow in the armature winding?

The commutator ensures the torque produced is always in the same direction by reversing current direction periodically.

Question 3 of 5

What is the function of the field winding in a DC motor?

The field winding generates the magnetic field essential for torque production. The armature current interacts with it.

Question 4 of 5

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

Back EMF is generated by the rotating armature and opposes the applied voltage, regulating armature current.

Question 5 of 5

How can the speed of a DC motor be controlled?

Speed control can be achieved by varying the armature voltage or the magnetic field strength of the field winding.

DC motor working principal Quiz