Electrical Measuring Instruments | Practice MCQs Physics for Mdcat | mosaicbro.com

Electrical Measuring Instruments | Practice MCQs Physics for Mdcat

7 of 79 questions (Page 6 of 12)

Filter by Category

36 Transformer works on:
Correct Answer: A
Explanation: Transformers require alternating current to induce a changing magnetic flux.
37 In a step-up transformer, the number of turns in:
Correct Answer: A
Explanation: A step-up transformer has fewer turns in the primary coil than in the secondary coil.
38 Alternating current is one which changes in:
Correct Answer: C
Explanation: AC changes both magnitude and direction periodically.
39 Alternate voltage is:
Correct Answer: D
Explanation: Alternating voltage varies sinusoidally with time, described by $V = V_0 \sin(\omega t)$.
40 Once complete set of positive and negative values of alternating quantities is called:
Correct Answer: D
Explanation: A cycle includes one complete positive and negative variation of the waveform.
41 The frequency of A.C Mains in Pakistan is:
Correct Answer: B
Explanation: The standard frequency for AC mains in Pakistan is 50 Hz.
42 A.C can be measured with the help of:
Correct Answer: B
Explanation: Hot wire ammeters are suitable for measuring AC due to their thermal operating principle.
MCQs Bank by mosaicbro.com