Computer Programming MCQs

5739 MCQs  (Page 132 of 574)

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
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
Poor power factor________?
A. reduces load handling capability of electrical system
B. results in more power losses in the electrical system
C. overloads alternators, transformers and distribution lines
D. results in more voltage drop in the line
In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value__________?
A. Will change the maximum value of current at resonance
B. Will change the resonance frequency
C. Will change the impedance at resonance frequency
D. Will increase the selectivity of the circuit
Inductance affects the direct current flow__________?
A. Only at the time of turning off
B. Only at the time of turning on
C. At the time of turning on and off
D. At all the time of operation
In a highly capacitive circuit the__________?
A. Apparent power is equal to the actual power
B. Reactive power is more than the apparent power
C. Reactive power is more than the actual power
D. Actual power is more than its reactive power
Inductance of a coil Varies__________?
A. directly as the cross-sectional area of magnetic core
B. directly as square of number of turns
C. directly as the permeability of the core
D. inversely as the length of the iron path
Pure inductive circuit____________?
A. Consumes some power on average
B. Does not take power at all from a line
C. Takes power from the line during some part of the cycle and then returns back to it during other part of the cycle
D. None of the above