Question

True or false, explain if false

a) The speed of DC motor is proportional to the main magnetic flux.
b) Series motors are variable-speed motors.
c) The torque produced by a series motor is proportional to the square of armature current.
d) Shunt motors are high-torque motors.
e)The speed of a motor will decrease with a decrease in the main magnetic flux.

Answer 1

[AI-generated answer — Bot GPT 3.5]

a) False. The speed of a DC motor is proportional to the applied voltage, not the main magnetic flux.

b) True. Series motors have variable speeds.

c) True. The torque produced by a series motor is proportional to the square of the armature current.

d) False. Shunt motors are typically not high-torque motors, they are better suited for applications where a constant speed is required.

e) True. The speed of a motor will decrease with a decrease in the main magnetic flux, as the back EMF generated is reduced.