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
Internal resistance is the resistance offered by________________?
Internal resistance is the resistance offered by________________?
A. source of EMF
B. conductor
C. resistor
D. capacitor
Which one is the best material for making connecting wires ?
Which one is the best material for making connecting wires ?
A. iron
B. tungsten
C. silver
D. copper
Resistance of a super conductor is ______________________?
Resistance of a super conductor is ______________________?
A. finite
B. infinite
C. zero
D. changes with every conductor
How much heat does a 40 W bulb generates in one hour ?
How much heat does a 40 W bulb generates in one hour ?
A. 144000J
B. 144J
C. 1.44J
D. 14J
One kilowatt hour is the amount of energy delivered during _______________?
One kilowatt hour is the amount of energy delivered during _______________?
A. one second
B. one day
C. one minute
D. one hour