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.Management Sciences
Category: Basic Electrical Mcqs
Instantaneous power in inductor is proportional to the
A. product of the instantaneous current and rate of change of current.
B. square of instantaneous current.
C. square of the rate of change of current.
D Temperature of the inductor.
(more…)
Which of the following statement is true both for a series and a parallel D. C. circuit?
A. Elements have individual currents
B. Currents are additive
C. Voltages are additive
D. Power are additive
A rheostat differs from potentiometer in the respect that it_____________?
A. has lower wattage rating
B. has higher wattage rating
C. has large number of turns
D. offers large number of tapping
You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect__________?
A. two in parallel
B. two in parallel and one in series
C. three in parallel
D. three in series
are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators______________?
A. Varistors
B. Thermistor
C. Semi-conductors
D. Variable resistors
A glass rod when rubbed with silk cloth is charged because__________?
A. it takes in proton
B. its atoms are removed
C. it gives away electrons
D. it gives away positive charge
With rise in temperature the resistance of pure metals______________?
A. increases
B. decreases
C. first increases and then decreases
D. remains constant
An electric filament bulb can be worked from____________?
A. D. C. supply only
B. A. C. supply only
C. Battery supply only
D. All above
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