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.Management Sciences
Category: Electrical Engineering Mcqs
“Any number of current sources in parallel may be replaced by a single current source whose current is the algebraic sum of individual source currents and source resistance is the parallel combination of individual source resistances”. This statement is associated with:
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A. Thevenin’s theorem
B. Millman’s theorem
C. Maximum power transfer theorem
D. None of the above
In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
A. 0°
B. 60°
C. 90°
D. 120°
The insulation on a current carrying conductor is provided__________?
A. to prevent leakage of current
B. to prevent shock
C. both of above factors
D. none of above factors
Which of the following motors is inherently self starting ?
A. Split motor
B. Shaded-pole motor
C. Reluctance motor
D. None of these
What is used to protect a thyristor from high di / dt conditions__________?
A. Fuse.
B. Snubber circuit
C. Inductor
D. Voltage clamping device
Which D.C. motor is preferred for elevators ?
A. Shunt motor
B. Series motor
C. Differential compound motor
D. Cumulative compound motor
The current due to electron flow in conduction band is the hole current in valence band?
A. equal to
B. less than
C. greater than
D. any of the above
In a transformer the resistance between its primary and secondary should be_____________?
A. zero
B. 10 Q
C. 1000 Q
D. infinity
The speed of a D.C. series motor is_____________?
A. proportional to the armature current
B. proportional to the square of the armature current
C. proportional to field current
D. inversely proportional to the armature current
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