Alternating Voltage and Current MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Alternating Voltage and Current, a fundamental topic in the field of Basic Electrical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Alternating Voltage and Current MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Alternating Voltage and Current mcq questions that explore various aspects of Alternating Voltage and Current problems. Each MCQ is crafted to challenge your understanding of Alternating Voltage and Current principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Electrical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Alternating Voltage and Current MCQs are your pathway to success in mastering this essential Basic Electrical Engineering topic.

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Alternating Voltage and Current MCQs | Page 7 of 7

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Q61.
Usually phasor diagrams are drawn representing?

a.

RMS value

b.

Peak value

c.

Average value

d.

Instantaneous value

Discuss
Answer: (a).RMS value
Q62.
If two current phasors, having magnitude 12A and 5A intersect at an angle of 90 degrees, calculate the resultant current.

a.

13 A

b.

10 A

c.

6 A

d.

5 A

Discuss
Answer: (a).13 A
Q63.
If two current phasors, having magnitude 5A and 10A intersect at an angle of 60 degrees, calculate the resultant current.

a.

12.23 A

b.

12.54 A

c.

13.23 A

d.

14.24 A

Discuss
Answer: (c).13.23 A
Q64.
The instantaneous values of two alternating voltages are given as:

v1=60sinθ and v2=40sin(θ − π/3).

Find the instantaneous sum.

a.

87.2 sin(36.5°) V

b.

87.2 sin( 0.5°) V

c.

87.2 sin(26.5°) V

d.

87.2 cos(36.5°) V

Discuss
Answer: (a).87.2 sin(36.5°) V
Q65.
The instantaneous values of two alternating voltages are given as:

v1=60sinθ and v2=40sin(θ − π/3).

Find the instantaneous difference.

a.

53 sin(71.5°) V

b.

53 sin( 79..5°) V

c.

53 sin(26.5°) V

d.

53 cos(36.5°) V

Discuss
Answer: (b).53 sin( 79..5°) V
Q66.
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

Discuss
Answer: (b).Parallelogram law
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