Which one of the following bulbs has the least resistance ?
A. 100 watt
B. 200 watt
C. 300 watt
D. 60 watt
Current Electricity
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