ELECTRICAL ENGINEERING MCQ_37

Q.581 Which of the following diode has the least reserve recovery time?
A. General purpose diode
B. Fast recovery diode
C. Both A and B
D. Silicon carbide diode
Ans.: D

Q.582 Three phase 6-pulse rectifier is also known as 3-phase
A. half wave rectifier
B. Full wave rectifier
C. quarter wave rectifier
D. None of the above
Ans.: B

Q.583 Rectifier converts
A. AC into DC
B. DC into AC
C. AC into AC (frequency is different)
D. DC into DC (magnitude is different)
Ans.: A

Q.584 Crest factor is defined as
A. Peak value
B. RMS value
C. Ratio of A and B
D. RMS value/ Peak value
Ans.: C

Q.585 Speed torque characteristics of induction motor in its operating region is nearly same as that of
A. DC shunt motor
B. DC series motor
C. DC series generator
D. None of the above
Ans.: A

Q.586 The gain of inverting operational amplifier is defined as

A. –Rf/R1
B. Rf/R1
C. 1 + Rf/R1
D. 1-Rf/R1
Ans.: A

Q.587 Single phase induction motor is ___. Its starting torque is__
A. Self starting, Tmax
B. Not self starting, 0
C. Self starting, 0
D. Not self starting, Tmax
Ans.: B

Q.588 Which circuit analysis can be used for non planner circuits?
A. Node analysis
B. Loop analysis
C. Mesh analysis
D. Both A and B
Ans.: A

Q.589 The average output voltage (Vdc) of a half wave rectifier with resistive load can be given by following expression, where Vmax is the maximum or perk voltage of the AC sinusoidal supply.
A. Vmax/л
B. 2Vmax / л
C. Vmax /2 л
D. 4Vmax/ л
Ans.: A

Q.590 A circuit has resistance R connected in series with capacitor C . Find time constant of the circuit.
A. 1/RC
B. RC
C. -1/RC
D. –RC
Ans.: B

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