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.Management Sciences
Category: Electrical Engineering Mcqs
The value of a of a transistor is_____________?
A. more than 1
B. less than 1
C. 1
D. none of the above
In amplitude modulation, bandwidth is ____________ the audio signal frequency?
A. Thrice
B. Four times
C. Twice
D. None of the above
In a 3 phase half wave rectifier, when firing angle is less than 90 degree, then the average dc output voltage becomes__________________?
A. Positive
B. Negative
C. Zero
D. None of these
relay is preferred for phase fault on short transmission line?
A. Induction type
B. Reactance
C. Impedance
D. None of the above
Oil switches are employed for_____________?
A. low currents circuits
B. low voltages circuits
C. high voltages and large currents circuits
D. all circuits
In case of a shaded pole motor the direction of rotation of the motor is__________?
A. from main pole to shaded pole
B. from shaded pole to main pole
C. either of the above depending on voltage
D. either of the above depending on power factor
Synchronsizing power of a synchronous machine is_____________?
A. direcly proportional to the synchronous reactance
B. inversely proportional to the synchronous reactance
A. equal to the synchronous reactance
D. none of the above
Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is______________?
A. 0.56 x 1015 m/s2
B. 1.5 x 1015 m/s2
C. 1.6 x 1015 m/s2
D. 1.76 x 1015 m/s2
When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on_________________?
A. Junction capacitance
B. Minority carriers
C. Majority carriers
D. None of the above
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