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.Management Sciences
Category: Electrical Engineering Mcqs
The conductors have transport phenomena of electrons due to____________?
A. electric field
B. magnetic field
C. electromagnetic field
D. none of the above
When a D.C. series motor is connected to A.C. supply, the power factor will be low because of____________?
A. high inductance of field and armature circuits
B. induced current in rotor due to variations of flux
C. fine copper wire winding
D. none of the above
If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be____________?
A. zero
B. small
C. the same as rated voltage
D. high
By which of the following methods the temperature rise of windings and other parts may be determined ?
A. Thermometer method
B. Resistance method
C. Embedded temperature detector method
D. Any of the above
Indicate which of the following three binary additions are correct? 1.1011 + 1010 = 10101 II. 1010 + 1101 = 10111 ?
III. 1010 + 1101 = 11111
A. I and II
B. II and III
C. III only
D. II and III
In a multivibrator, we have___________ feedback?
A. Negative
B. 100 % positive
C. Both positive and negative
D. None of the above
Which of the following expression is correct for electric field strength___________?
A. E = D/E
B. E = D2/t
C. E = jtD
D. E= nD2
If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?
A. less than that of disc but in opposite direction
B. equal to that of disc and in the same direction
C. equal to that of disc and in the opposite direction
D. less than that of disc and in the same direction
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