Phasor Algebra MCQ Questions Answers Electrical Engineering

Phasor Algebra Electrical Engineering MCQ Questions Answers


1) A current of 3 + j 4 amperes is flowing through a circuit. The magnitude of current is ………

a) 7 A

b) 5 A

c) 1 A

d) 1.33 A

View Answer
Option – b)

2) In the complex number 4 + j 7, 7 is called the ……… component.

a) real

b) imaginary

c) in-phase

d) quadrature

View Answer
Option – d)

3) The conjugate of -4 + j 3 is …………

a) 4 – j 3

b) -4 – j 3

c) 4 + j 3

d) none of the above

View Answer
Option – b)

4) For addition or subtraction of phasors, we use …….. form.

a) polar

b) rectangular

c) trigonometrical

d) none of the above

View Answer
Option – b)

5) The reciprocal of j is

a) j

b) –j

c) j2

d) none of above

View Answer
Option – b)

6) In the above problem, circuit power factor is

a) 0.756 lag

b) 0.525 lead

c) 0.625 lag

d) 0.852 lag

View Answer
Option – a)

7) In the above question, the value of inductance is

a) 0.25 H

b) 0.08 H

c) 1.25 H

d) 0.318 H

View Answer
Option – d)

8) In the above question, what is the power factor of the circuit ?

a) 0.525 leading

b) 0.803 lagging

c) 0.625 leading

d) 0.325 lagging

View Answer
Option – b)

9) In the above question, what is the circuit power factor ?

a) 0.707 lag

b) 0.848 lag

c) 0.515 lag

d) 0.432 lag

View Answer
Option – b)

10) The a.c. power in a load that is conserved is

a) real

b) reactive

c) apparent

d) all above

View Answer
Option – d)
error: