Question Detail

PHY 102 Electromagnetic Induction Objective Question

Question

Why do commercial motors use many coils of wire around the armature?
Options
A To increase resistance
B To produce a smoother torque and reduce pulsations
Correct Answer
C To decrease weight
D To increase the number of commutator segments
Correct Answer

Option B is the correct answer.

Detailed Explanation

Multiple coils produce a more uniform torque because at any given angle, some coils are producing maximum torque while others are at different positions, smoothing out the output.

Hint

Smoother rotation, less pulsing.

Question Info