DC Motors MCQ

The speed of a D.C. shunt motor can be increased by

What will happen, with the increase in speed of a DC motor?

What will happen if the back emf of a DC motor vanishes suddenly?

Direction of rotation of motor is determined by

Which part will surely tell that given motor is DC motor and not an AC type?

In DC motor, which of the following part can sustain the maximum temperature rise?

Which power is mentioned on a name plate of a motor?

The current drawn by the armature of DC motor is directly proportional to

An electric motor is having constant output power. So, motor will have a torque speed characteristic

Which of the following quantity will decrease if supply voltage is increased?

In which of the following case we will get maximum power?

Sometimes motor has to be de-rated

Sparking is discouraged in a DC motor

The armature shaft of a DC motor must be able to withstand

In DC machines the residual magnetism is present. The order of residual magnetism is

Why field winding of a DC series motor is provided with thick wire?

The output power of any electrical (AC or DC) motor is taken from the

Which function is performed by counter emf of a DC motor?

Armature resistance control method is used for the speed

For very sensitive and wide speed control, which of the following method is preferred?

Field weakening control method is used for the speed

Torque developed by a DC motor depends upon

What will happen to torque if back emf and speed of the DC motor is doubled?

Which of the following motor is used where high starting torque and wide speed range control is required?

The armature voltage control of DC motor will provide