Basic Electrical Engineering (3110005) MCQs

MCQs of AC Circuits

Showing 51 to 60 out of 117 Questions
3 4 5 6 7 8
51.
For addition and subtraction of phasors, we use the _________ form.
(a) Rectangular
(b) Polar
(c) Either rectangular or polar
(d) Neither rectangular nor polar
Answer:

Option (a)

52.
For multiplication and division of phasors, we use ____________ form.
(a) Rectangular
(b) Polar
(c) Either rectangular or polar
(d) Neither rectangular nor polar
Answer:

Option (b)

53.
What is the correct expression of ω?
(a) ω = 2π
(b) ω = 2πf
(c) ω = πf
(d) ω = 2f
Answer:

Option (b)

54.
The time axis of an AC phasor represents?
(a) Time
(b) Phase angle
(c) Voltage
(d) Current
Answer:

Option (b)

55.
The length of the phasor represents?
(a) Magnitude of the quantity
(b) Direction of the quantity
(c) Neither magnitude nor direction
(d) Either magnitude or direction
Answer:

Option (a)

56.
The rms value is _________ times he maximum value
(a) 1.414
(b) 0.5
(c) 2
(d) 0.707
Answer:

Option (d)

57.
Usually phasor diagrams are drawn representing?
(a) RMS value
(b) Peak value
(c) Average value
(d) Instantaneous value
Answer:

Option (a)

58.
The resultant of two alternating sinusoidal voltages or currents can be found using ___________
(a) Triangular law
(b) Parallelogram law
(c) Either triangular or parallelogram law
(d) Neither triangular nor parallelogram law
Answer:

Option (b)

59.
The power for a purely resistive circuit is zero when?
(a) Current is zero
(b) Voltage is zero
(c) Both current and voltage are zero
(d) Either current or voltage is zero
Answer:

Option (d)

60.
Inductor does not allow sudden changes in?
(a) Voltage
(b) Current
(c) Resistance
(d) Inductance
Answer:

Option (b)

Showing 51 to 60 out of 117 Questions
3 4 5 6 7 8