D.C. Motor and Fleming's Left Hand Rule

What are the main components of a d.c. motor?

• stator, rotor, slip rings, and field magnet

• armature, commutator, brushes, and field magnet

• stator, commutator, brushes, and rotor

• armature, slip rings, brushes, and field magnet

What is the role of the split ring commutator in a d.c. motor?

• The split ring commutator increases the speed of the motor.

• The split ring commutator regulates the voltage in the motor.

• The split ring commutator reverses the direction of current in the armature coil.

• The split ring commutator reduces the friction in the motor.

How can you determine the direction of turning of the coil in a d.c. motor using Fleming's left hand rule?

• The direction of turning of the coil can be determined by the direction in which the thumb points.

• The direction of turning of the coil can be determined by the direction in which the pinky finger points.

• The direction of turning of the coil can be determined by the direction in which the index finger points.

• The direction of turning of the coil can be determined by the direction in which the middle finger points.

Explain the function of the armature coil in a d.c. motor.

• The armature coil generates electricity in a d.c. motor.

• The armature coil produces the rotational motion in a d.c. motor.

• The armature coil controls the speed of a d.c. motor.

• The armature coil provides stability to a d.c. motor.

What happens if the direction of the current in the armature coil is reversed in a d.c. motor?

• The motor will rotate in the opposite direction for a short period and then stop.

• The direction of the motor's rotation will be reversed.

• The motor will rotate faster.

• The motor will stop working.