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Instantaneous Power MCQ Questions & Answers

Instantaneous Power MCQs : This section focuses on the "Instantaneous Power". These Multiple Choice Questions (MCQs) should be practiced to improve the Instantaneous Power skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

In inductor, the energy delivered by source is ____________ by inductor

A. stored as magnetic field
B. dissipated in the form of heat
C. returned to source
D. stored as electric field

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Question 2

Instantaneous power is negative, when the polarities of voltage and current are of __________

A. opposite sign
B. same sign
C. voltage is zero
D. current is zero

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Question 3

At θ=π/2, positive portion is __________ negative portion in power cycle.

A. greater than
B. less than
C. equal to
D. greater than or equal to

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Question 4

If there is complex impedance in a circuit, part of energy is ____________ by reactive part and part of its energy is ____________ by the resistance.

A. alternately stored and returned, alternately stored and returned
B. alternately stored and returned, dissipated
C. dissipated, alternately stored and returned
D. dissipated, dissipated

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Question 5

In capacitor, the energy delivered by source is ____________ by capacitor.

A. returned to source
B. dissipated in the form of heat
C. stored as electric field
D. stored as magnetic field

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Question 6

In inductor, the energy delivered by source is ____________ by inductor.

A. stored as magnetic field
B. dissipated in the form of heat
C. returned to source
D. stored as electric field

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Question 7

In P (t) equation, if θ=0, then P (t) =?

A. (VmIm/2)(1+cos⁡ωt)
B. (VmIm/2)(cos⁡ωt)
C. (VmIm/2)(cos⁡2ωt)
D. (VmIm)(1+cos⁡2ωt)

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Question 8

In purely resistive circuit, energy delivered by source is ____________ by resistance.

A. dissipated in the form of heat
B. stored as electric field
C. stored as magnetic field
D. returned to source

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Question 9

The average value of power if θ=0⁰ is?

A. VmIm/2
B. VmIm/2
C. VmIm/4
D. VmIm/8

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Question 10

The equation of instantaneous power is?

A. P (t) = (VmIm/2)(cos⁡(2ωt+θ)+sin⁡θ)
B. P (t) = (VmIm/2)(sin⁡(2ωt+θ)+cos⁡θ)
C. P (t) = (VmIm/2)(cos⁡(2ωt+θ)+cos⁡θ)
D. P (t) = (VmIm/2)(sin⁡(2ωt+θ)+sin⁡θ)

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Question 11

The time varying part in the equation of instantaneous power has frequency ________________ that of the frequency of voltage or current wave forms.

A. equal to
B. twice
C. thrice
D. four times

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