Which is the best conductor of electricity _______________?
Which is the best conductor of electricity _______________?
A. Iron
B. Silver
C. Copper
D. Carbon
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Which of the following materials has a negative temperature co-efficient of resistance?
Which of the following materials has a negative temperature co-efficient of resistance?
A. Copper
B. Aluminum
C. Carbon
D. BrassYou have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect__________?
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 seriesThree 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open_________________?
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open_________________?
A. there will be heavy current in the main line
B. rest of the two bulbs will not light
C. all three bulbs will light
D. the other two bulbs will lightThe ratio of mass of proton to that of electron is nearly_____________?
The ratio of mass of proton to that of electron is nearly_____________?
A. 1840
B. 1840
C. 30
D. 4The filament of an electric bulb is made of______________?
The filament of an electric bulb is made of______________?
A. carbon
B. aluminium
C. tungsten
D. nickelThe resistance of a few meters of wire conductor in closed electrical circuit is____________?
The resistance of a few meters of wire conductor in closed electrical circuit is____________?
A. practically zero
B. low
C. high
D. very high