Alternating Currents MCQ Questions Answers Electronics Engineering


11) In the above question, the average power in the circuit is ……….

a) 2500 W

b) 250 W

c) 25 W

d) 1250 W

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Option – d)

12) An alternative voltage or current is a ………..

a) scalar quantity

b) vector quantity

c) phasor

d) none of the above

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Option – c)

13)The time period of direct current is

a) infinite

b) zero

c) finite

d) cannot say

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Option – a)

14) In an a.c. circuit, electrical energy is consumed in

a) L

b) C

c) L and C

d) R

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Option – d)

15) The frequency of d.c. in India is

a) 50 Hz

b) 30 Hz

c) 60 Hz

d) zero

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Option – d)

16) An alternating current is converted to direct current by

a) dynamo

b) transformed

c) rectifier

d) motor

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Option – c)

17) In comparison to d.c., transmission losses in a.c. are

a) high

b) low

c) negligible

d) none of the above

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Option – a)

18) A circuit element that opposes the change in circuit voltage is

a) resistor

b) inductor

c) capacitor

d) all of the above

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Option – c)

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