Search
.Management Sciences
Category: Electrical Engineering Mcqs
The leakage current in a crystal diode is due to _________________?
A. minority carriers
B. majority carriers
C. junction capacitance
D. none of the above
The r.m.s. value of pure cosine function is_________?
A. 0.5 of peak value
B. 0.707 of peak value
C. same as peak value
D. zero
Rise time is defined by the interval when____________?
A. gate current rises from 90 % to 100 % of it final value
B. anode voltage drops from 90 % to 10 % of its initial value
C. anode current rises 10 % to 90 % of its final value
D. both B and C
In a series parallel circuit, any two resistances in the same current path must be in___________?
A. series with each other
B. parallel with each other
C. series with the voltage source
D. parallel with the voltage source
Primary air is that air which is used to_____________?
A. reduce the flame length
B. increase the flame length
C. transport and dry the coal
D. provide air around burners for get¬ting optimum combustion
Which of the following is the advantage of electric braking ?
A. It avoids wear of track
B. Motor continues to remain loaded during braking
C. It is instantaneous
D. More heat is generated during braking
A small coil lies inside a large coil. The two coils are horizontal concentric and carry currents in opposite directions. The large coil will experience______________?
A. A torque about horizontal axis
B. A torque about vertical axis
C. An upward force along the axis
D. No resultant force
Which of the following circuit element stores energy in the electromagnetic field ?
A. Inductance
B. Condenser
C. Variable resistor
D. Resistance
The power factor of a single-phase induction motor is usually?
A. lagging
B. always leading
C. unity
D. unity to 0.8 leading
Recent Comments