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.Management Sciences
Category: Basic Electrical Mcqs
With rise in temperature the resistance of pure metals______________?
0
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
Which of the following quantities consists of SI unit as WATT ?
A. Force
B. Charge
C. Current
D. Power
(more…)
Conductance : mho :: ____________?
A. resistance : ohm
B. capacitance : henry
C. inductance : farad
D. lumen : steradian
For testing appliances, the wattage of test lamp should be_____________?
A. very low
B. low
C. high
D. any value
A 3 Q resistor having 2 A current will dissipate the power of_______________?
A. 2 watts
B. 4 watts
C. 6 watts
D. 12 watts
Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be_________________?
A. 9 times
B. 1/9 times
C. 1/3 times
D. 3 times
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will__________
A. decrease
B. increase
C. remain same
D. heater will burn out
Ohm’s law is not applicable to____________?
A. vacuum tubes
B. carbon resistors
C. high voltage circuits
D. circuits with low current densities
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