Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat | mosaicbro.com

Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat

7 of 127 questions (Page 9 of 19)

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57 An alternating current is converted into direct current by a:
Correct Answer: B
Explanation: Rectifiers convert AC to DC.
58 A.C. can be measured with the help of:
Correct Answer: A
Explanation: AC is typically measured using its heating effect (RMS value).
59 Which of the following converts electrical energy into mechanical energy?
Correct Answer: B
Explanation: Motors convert electrical to mechanical energy.
60 An electric motor is a device which converts:
Correct Answer: D
Explanation: Motors convert electrical to mechanical energy.
61 For electroplating we use:
Correct Answer: A
Explanation: Electroplating requires DC for controlled ion deposition.
62 The only difference between construction of D.C generator and an A.C. generator is that of:
Correct Answer: C
Explanation: DC generators use commutators to produce unidirectional current.
63 A.C. and D.C. have the same:
Correct Answer: D
Explanation: Both AC and DC produce Joule heating in resistors.
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