- Home
- Category
- Electrical Engineering Questions
- AC Fundamentals, Circuits & Circuit Theory Mcqs
- AC Fundamentals, Circuits & Circuit Theory Mcqs - Set 2
MCQs 1: Two waves of the same frequency have opposite phase when the phase angle between them is_________?
MCQs 2: The power consumed in a circuit element will be least when the phase difference between the current and voltage is________?
MCQs 3: For the same peak value, which of the following wave has the least mean value ?
MCQs 4: The r.m.s. value and mean value is the same in the case of___________?
MCQs 5: Form factor for a sine wave is________?
MCQs 6: For a sine wave with peak value Imax the r.m.s. value is_______?
MCQs 7: For a sine wave with peak value Emax _______ 8.30. the average value is?
MCQs 8: Form Factor is the ratio of__________?
average value/r.m.s. value
average value/peak value
r.m.s. value/average value
r.m.s. value/peak value
MCQs 9: The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of_______degrees?
MCQs 10: Capacitors for power factor correction are rated in_________?
MCQs 11: For a frequency of 200 Hz, the time period will be__________?
MCQs 12: Capacitive reactance is more when_______?
capacitance is less and frequency of supply is less
capacitance is less and frequency of supply is more
capacitance is more and frequency of supply is less
capacitance is more and frequency of supply is more
MCQs 13: Time constant of an inductive circuit___________?
increases with increase of inductance and decrease of resistance
increases with the increase of inductance and the increase of resistance
increases with decrease of inductance and decrease of resistance
increases with decrease of inductance and increase of resistance
MCQs 14: Poor power factor________?
reduces load handling capability of electrical system
results in more power losses in the electrical system
overloads alternators, transformers and distribution lines
results in more voltage drop in the line
results in all above
MCQs 15: In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value__________?
will change the maximum value of current at resonance
will change the resonance frequency
will change the impedance at resonance frequency
will increase the selectivity of the circuit
MCQs 16: Inductance affects the direct current flow__________?
only at the time of turning off
only at the time of turning on
at the time of turning on and off
at all the time of operation
MCQs 17: In a highly capacitive circuit the__________?
apparent power is equal to the actual power
reactive power is more than the apparent power
reactive power is more than the actual power
actual power is more than its reactive power
MCQs 18: Inductance of a coil Varies__________?
directly as the cross-sectional area of magnetic core
directly as square of number of turns
directly as the permeability of the core
inversely as the length of the iron path
as A. to (d)
MCQs 19: Pure inductive circuit____________?
consumes some power on average
does not take power at all from a line
takes power from the line during some part of the cycle and then returns back to it during other part of the cycle
none of the above
MCQs 20: Power factor of the following circuit will be zero__________?
ABOUT US
Category
Who We Are