Related Questions

A power supply which has voltage regulation of ___________ is unregulated power supply
A 0%
B 5%
C 10%
D 8%
Commercial power supplies have voltage regulation ___________
A of 10%
B of 15%
C of 25%
D within 1%
Which of the following is used for regulated electric supply ?
A Zener diode
B Junction diode
C Gun diode
D Tunnel diode
The voltage regulation in magnetic amplifier type voltage regulator is effected by
A Electromagnetic induction
B Varying the resistance
C Varying the reactance
D Variable transformer
In an unregulated power supply, if input a.c. voltage increases, the output voltage .
A Increases
B Decreases
C Remains the same
D None of the above
In an SCR circuit the supply voltage is generally ___________ that of breakover voltage
A Equal to
B Less than
C Greater than
D None of the above
Minimum voltage regulation occurs when the power factor of the load is
A unity
B lagging
C leading
D zero
If in a synchronous motor, driving a given mechanical load and drawing current at a leading power factor from constant voltage supply its field excitation is increased, its power factor
A will become more
B will become less
C will remain unchanged
D none of the above.
If in a synchronous motor, driving mechanical load and drawing current at lagging power factor from constant voltage supply, its field excitation is increased, then its power factor
A become more
B become less
C remain constant
D none of the above
A Zener diode utilises ___________ characteristic for voltage regulation
A Forward
B Reverse
C Both forward and reverse
D None of the above

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