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Month: December 2018

Time constant of an inductive circuit___________?

July 18, 2021December 11, 2018 by admin
Time constant of an inductive circuit___________?

A. increases with increase of inductance and decrease of resistance
B. increases with the increase of inductance and the increase of resistance
C. increases with decrease of inductance and decrease of resistance
D. increases with decrease of inductance and increase of resistance

Categories A.C. Fundamentals, Circuits and Circuit Theory

Capacitive reactance is more when_______?

July 18, 2021December 11, 2018 by admin
Capacitive reactance is more when_______?

A. capacitance is less and frequency of supply is less
B. capacitance is less and frequency of supply is more
C. capacitance is more and frequency of supply is less
D. capacitance is more and frequency of supply is more

Categories A.C. Fundamentals, Circuits and Circuit Theory

For a frequency of 200 Hz, the time period will be__________?

July 18, 2021December 11, 2018 by admin
For a frequency of 200 Hz, the time period will be__________?

A. 0.05 s
B. 0.005 s
C. 0.0005 s
D. 0.5 s

Categories A.C. Fundamentals, Circuits and Circuit Theory

Capacitors for power factor correction are rated in_________?

July 18, 2021December 11, 2018 by admin
Capacitors for power factor correction are rated in_________?

A. kW
B. kVA
C. kV
D. kVAR

Categories A.C. Fundamentals, Circuits and Circuit Theory

The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of_______degrees?

July 18, 2021December 11, 2018 by admin
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of_______degrees?

A. 90
B. 60
C. 45
D. 30

Categories A.C. Fundamentals, Circuits and Circuit Theory

Form Factor is the ratio of__________?

July 18, 2021December 11, 2018 by admin
Form Factor is the ratio of__________?

A. average value/r.m.s. value
B. average value/peak value
C. r.m.s. value/average value
D. r.m.s. value/peak value

Categories A.C. Fundamentals, Circuits and Circuit Theory

For a sine wave with peak value Emax _______ 8.30. the average value is?

July 18, 2021December 11, 2018 by admin
For a sine wave with peak value Emax _______ 8.30. the average value is?

A. 0.636 Emax
B. 0.707 Emax
C. 0.434 EWc
D. lAUEmax

Categories A.C. Fundamentals, Circuits and Circuit Theory

For a sine wave with peak value Imax the r.m.s. value is_______?

July 18, 2021December 11, 2018 by admin
For a sine wave with peak value Imax the r.m.s. value is_______?

A. 0.5 Imax
B. 0.707
C. 0.9
D. 1.414 Lmax

Categories A.C. Fundamentals, Circuits and Circuit Theory

Form factor for a sine wave is________?

July 18, 2021December 11, 2018 by admin
Form factor for a sine wave is________?

A. 1.414
B. 0.707
C. 1.11
D. 0.637

Categories A.C. Fundamentals, Circuits and Circuit Theory

The r.m.s. value and mean value is the same in the case of___________?

July 18, 2021December 11, 2018 by admin
The r.m.s. value and mean value is the same in the case of___________?

A. triangular wave
B. sine wave
C. square wave
D. half wave rectified sine wave

Categories A.C. Fundamentals, Circuits and Circuit Theory
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