Question 1 : The resultant of two alternating sinusoidal voltages or currents can be found using ___________
1. Triangular law
2. Parallelogram law
3. Either triangular or parallelogram law
4. Neither triangular nor parallelogram law
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Question 2 : The instantaneous values of two alternating voltages are given as:
v1=60sin? and v2=40sin(? - p/3). Find the instantaneous difference.
1. 53 sin(71.5°) V
2. 53 sin( 79..5°) V
3. 53 sin(26.5°) V
4. 53 cos(36.5°) V
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Question 3 : The instantaneous values of two alternating voltages are given as _________
v1=60sin? and v2=40sin(? - p/3). Find the instantaneous sum.
1. 87.2 sin(36.5°) V
2. 87.2 sin( 0.5°) V
3. 87.2 sin(26.5°) V
4. 87.2 cos(36.5°) V
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Question 4 : If two current phasors, having magnitude 5A and 10A intersect at an angle of 60 degrees, calculate the resultant current.
1. 12.23 A
2. 12.54 A
3. 13.23 A
4. 14.24 A
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Question 5 : If two current phasors, having magnitude 12A and 5A intersect at an angle of 90 degrees, calculate the resultant current.
1. 13 A
2. 10 A
3. 6 A
4. 5 A
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Question 6 : Usually phasor diagrams are drawn representing?
1. RMS value
2. Peak value
3. Average value
4. Instantaneous value
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Question 7 : If the phasors are drawn to represent the maximum values instead of the rms values, what would happen to the phase angle between quantities?
1. Increases
2. Decreases
3. Remains constant
4. Becomes zero
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Question 8 : The rms value is 0.707 times the _________ value.
1. Peak
2. Instantaneous
3. Average
4. DC
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Question 9 : The rms value is _________ times he maximum value
1. 1.414
2. 0.5
3. 2
4. 0.707
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Question 10 : Ammeters and voltmeters are calibrated to read?
1. RMS value
2. Peak value
3. Average value
4. Instantaneous value
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