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

Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat

7 of 127 questions (Page 10 of 19)

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64 Device used for converting A.C. into D.C. is called:
Correct Answer: D
Explanation: Rectifiers convert AC to DC.
65 A transformer is a device which:
Correct Answer: C
Explanation: Transformers adjust AC voltage up or down.
66 A transformer consists of an iron core with:
Correct Answer: D
Explanation: Transformers have both primary and secondary coils.
67 A transformer is used to change:
Correct Answer: B
Explanation: Transformers change AC voltage levels.
68 A device consisting of two coils wound or iron core is called a:
Correct Answer: D
Explanation: Transformers have two coils on an iron core.
69 The practical application of the phenomenon of mutual induction is:
Correct Answer: B
Explanation: Transformers operate via mutual induction.
70 Frequency of A.C. used in Pakistan is:
Correct Answer: C
Explanation: Pakistan uses 50 Hz AC.
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