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Test: Instantaneous Power - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Network Theory (Electric Circuits) - Test: Instantaneous Power

Test: Instantaneous Power for Electrical Engineering (EE) 2024 is part of Network Theory (Electric Circuits) preparation. The Test: Instantaneous Power questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Instantaneous Power MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Instantaneous Power below.
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Test: Instantaneous Power - Question 1

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

Detailed Solution for Test: Instantaneous Power - Question 1

At θ = π/2, the area under positive portion is equal to the area under negative portion in power cycle. At this instant the power dissipated in the circuit is zero.

Test: Instantaneous Power - Question 2

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

Detailed Solution for Test: Instantaneous Power - Question 2

In P (t) equation, if θ=0⁰, then P (t) =(VmIm/2)(1+cos⁡2ωt). The power wave has a frequency twice that of the voltage or current. Here the average value of power is VmIm/2.

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Test: Instantaneous Power - Question 3

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

Detailed Solution for Test: Instantaneous Power - Question 3

The time varying part in the equation of instantaneous power has a frequency twice that of voltage or current wave forms and the other part is a fixed part.

Test: Instantaneous Power - 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.

Detailed Solution for Test: Instantaneous Power - Question 4

If there is complex impedance in a circuit, part of energy is alternately stored and returned by reactive part and part of its energy is dissipated by the resistance. The amount of energy dissipated is determined by relative values of resistance and reactance.

Test: Instantaneous Power - Question 5

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

Detailed Solution for Test: Instantaneous Power - Question 5

In inductor, the energy delivered by source is stored as magnetic field by inductor and is not dissipated in the form of heat or stored as electric field.

Test: Instantaneous Power - Question 6

The average value of power if θ = 0⁰ is?

Detailed Solution for Test: Instantaneous Power - Question 6

The average value of power if θ = 0⁰ is VmIm/2. So, average power = VmIm/2 at θ = 0⁰. When phase angle is increased the negative portion of the power cycle increases and lesser power is dissipated.

Test: Instantaneous Power - Question 7

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

Detailed Solution for Test: Instantaneous Power - Question 7

Instantaneous power is negative, when voltage and current have opposite sign that is if voltage is positive, the current is negative and if current is positive, the voltage is negative.

Test: Instantaneous Power - Question 8

The equation of instantaneous power is?

Detailed Solution for Test: Instantaneous Power - Question 8

The equation of instantaneous power is P (t) = (VmIm/2)(cos⁡(2ωt + θ) + cos⁡θ). It consists of two parts. One is a fixed part and the other is time varying which has frequency twice that of the voltage or current wave forms.

Test: Instantaneous Power - Question 9

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

Detailed Solution for Test: Instantaneous Power - Question 9

In capacitor, the energy delivered by source is stored as electric field by capacitor and is not stored as magnetic field or dissipated in the form of heat.

Test: Instantaneous Power - Question 10

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

Detailed Solution for Test: Instantaneous Power - Question 10

In purely resistive circuit, energy delivered by source is dissipated in the form of heat by resistance and is not stored as either electric field or magnetic field.

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