Category: ELECTRICAL ENGINEERING

636. If the gain of an open loop system is doubled, the gain margin A. Is not affected B. Gets double C. Becomes half D. Becomes one-fourth Ans.: C

621. The equal area criterion of stability is applicable to A. Two machine system and infinite bus bars B. One machine system and infinite bus bars C. Multi-machine system only D. None of the above Ans.: B 622. The power Read More …

606. A 400/200 volts transformer has pu impedance of 0.05. The HV side voltage required to circulate full load current during short circuit test is A. 20 V B. 40 V C. 10 V D. 5 V Ans.: A 607. Read More …

591. An inductance of one H carrying a current of two amperes will store the energy of A. 2 watts B. 2 joules C. 4 watts D. 4 joules Ans.: B 592. The square waveform of current has following relation Read More …

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 Read More …

Q.566 Resistance of bulb when connected to AC supply is ____ that of DC supply. A. Less B. Greater C. Equal D. Con not decide from the data Ans.: B Q. 567 The frequency of power in a purely resistive Read More …

Q.541 Good power transformer has voltage regulation A. 100% B. below 5% C. Between 90% to 100% D. Between 50% and 100% Ans.: B Q.542 Power factor us the cosine of phase difference between voltage and current is the statement Read More …

Q.511 How many pins does 8085 microprocessor have? A. 30 B. 39 C. 40 D. 41 Ans.: C Q.512 With logic family provided minimum power dissipation? A. TTL B. CMOS C. ECL D. JFET Ans.: B Q.513 When a step Read More …

Q. 496 If the absolute voltage gain of an amplifier is 100 then its decibel gain is A. 20 dB B. 10 dB C. 40 dB D. 60 dB Ans.: C Q.497 In an amplifier coupling capacitor is used to Read More …

Q.526 Phase difference between the output and input voltage of common Emitter Amplifier is A. 180° B. 0° C. 270° D. 90° Ans.: A Q.527 A series capacitor used in a filter circuit represent A. low pass filter B. Band Read More …