Which one of the following bulbs has the least resistance ?
Which one of the following bulbs has the least resistance ?
A. 100 watt
B. 200 watt
C. 300 watt
D. 60 watt
Current Electricity
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A fuse is placed in series with the circuit to protect against__________________?
A fuse is placed in series with the circuit to protect against__________________?A. high power
B. high voltage
C. high current
D. over heating -
Electrical energy is converted to heat at the rate of___________________?
Electrical energy is converted to heat at the rate of___________________?A. IRt
B. I2R
C. I2Rt
D. VIt -
Electrical energy is measured in___________________?
Electrical energy is measured in___________________?A. watt
B. horse power
C. kilo watt
D. kilowatt hour -
The resistance of a conductor at absolute zero (OK) is________________?
The resistance of a conductor at absolute zero (OK) is________________?A. zero almost
B. infinite almost
C. no prediction at all
D. may increase or decrease -
The graphical representation of Ohms law is___________________?
The graphical representation of Ohms law is___________________?A. hyperbola
B. ellipse
C. parabola
D. straight line -
In liquids and gases the current is due to the motion________________?
In liquids and gases the current is due to the motion________________?A. negative charges
B. positive charges
C. both negative and positive charges
D. neutral particles -
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?A. 12
B. 24
C. 5
D. 1100 -
Resistance of a wire on increasing its temperature will_________________?
Resistance of a wire on increasing its temperature will_________________?A. increase with rise in temperature
B. decrease with rise in temperature
C. will remain same
D. depends upon altitude of experimentation -
Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains ?
Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains ?A. 40 W bulb
B. 60 W blub
C. 100 W blub
D. all will burn equally brightly