Question Detail

PHY 102 Test Compilation PHY 102 18 Objective Question
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Question

Which of the following has no effect on the size of the turning effect (torque) on the coil of an electric motor?
Options
A size of the current in the coil
B direction of the current in the coil
Correct Answer
C number of turns in the coil
D strength of the magnetic field
Correct Answer

Option B is the correct answer.

Detailed Explanation

Torque magnitude is τ = NBIA sinθ, which depends on current magnitude, turns, field strength, and orientation — reversing current direction changes rotation direction but not the magnitude of the torque.

Hint

Reversing current direction flips the direction of rotation, but does it change how strong the twisting force is?

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 18
Type: Objective
Difficulty: Not specified
Question 1177 of 1819
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