Post-UTME Physics 2018 Objective — Question 5
Question 5 of 20 from the Post-UTME Screening (Post-UTME) Physics 2018 Objective paper, with the correct answer and a full explanation.
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The function of the commutator in an electric motor is to
- A. measure the flow of current
- B. reverse the direction of the current in the coilCorrect
- C. indicate the direction of the current
- D. measure the resistance of the coil
Explanation
The commutator periodically reverses the direction of current in the coil, maintaining continuous rotation of a DC motor in one direction.
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