Question Detail

PHY 102 Electromagnetic Induction Objective Question
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Question

What is the purpose of a commutator in a DC generator/motor?
Options
A To increase the magnetic field
B To reverse the current direction every half cycle, keeping the output unidirectional
Correct Answer
C To decrease the armature resistance
D To convert AC to DC
Correct Answer

Option B is the correct answer.

Detailed Explanation

The split-ring commutator reverses the connection to the external circuit every half cycle, ensuring that the current in the external circuit always flows in the same direction (pulsating DC).

Hint

Reverses connections to keep current one-way.

Question Info

Course: PHY 102
Topic: Electromagnetic Induction
Type: Objective
Difficulty: Not specified
Question 26 of 1819
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