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A.C. Fundamentals, Circuits and Circuit Theory
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The frequency of domestic power supply in Pakistan is_________?
Related MCQs
In a three-phase supply floating neutral is undesirable because it way give rise to__________?
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The inductance of a coil can be increased by_________?
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The r.m.s. value of pure cosine function is_________?
The series and parallel resonance on L-C circuit’ differs in that_________?
The frequency of an alternating current is__________?
Ohm is unit of all of the following except__________?
The equation of 50 Hz current sine wave having r.m.s. value of 60 A is__________?
The power factor of a D.C. circuit is always__________?
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will__________?
In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will__________?
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The product of apparent power and cosine of the phase angle between circuit voltage and current is
A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________?
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In a pure inductive circuit__________?
In the case of an unsymmetrical alternating current the average value must always be taken over__________?
The transient currents are associated with the__________?
In a pure resistive circuit__________?
In a circuit containing R, L and C, power loss can take place in__________?
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The time constant of the capacitance circuit is defined as the time during which voltage________?
The square waveform of current has following relation between r.m.s. value and average value?
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Power factor of the system is kept high__________?
Power factor of the following circuit will be zero__________?
Pure inductive circuit__________?
Inductance of a coil Varies__________?
In a highly capacitive circuit the__________?
Inductance affects the direct current flow__________?
In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value__________?
Poor power factor________?
Time constant of an inductive circuit__________?
Capacitive reactance is more when_______?
For a frequency of 200 Hz, the time period will be__________?
Capacitors for power factor correction are rated in_________?
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of_______degrees?
Form Factor is the ratio of__________?
For a sine wave with peak value Emax _______ 8.30. the average value is?
For a sine wave with peak value Imax the r.m.s. value is_______?
Form factor for a sine wave is________?
The r.m.s. value and mean value is the same in the case of__________?
For the same peak value, which of the following wave has the least mean value ?
The power consumed in a circuit element will be least when the phase difference between the current and voltage is________?
Two waves of the same frequency have opposite phase when the phase angle between them is_________?
If two sine waves of the same frequency have a phase difference of JT radians, then_______?
A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to__________?
The frequency of domestic power supply in Pakistan is_________?
A. 200 Hz
B. 100 Hz
C. 60 Hz
D. 50 Hz
Correct Answer:
50 Hz
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Last Updated:
December 11, 2018