How much heat does a 40 W bulb generates in one hour ? April 17, 2025 by admin A. 144000J B. 144J C. 1.44J D. 14J
Resistance of a super conductor is ______________________? April 17, 2025 by admin A. finite B. infinite C. zero D. changes with every conductor
Which one is the best material for making connecting wires ? April 17, 2025 by admin A. iron B. tungsten C. silver D. copper
Internal resistance is the resistance offered by________________? April 17, 2025 by admin A. source of EMF B. conductor C. resistor D. capacitor
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 ? April 17, 2025 by admin A. 40 W bulb B. 60 W blub C. 100 W blub D. all will burn equally brightly
Resistance of a wire on increasing its temperature will_________________? April 17, 2025 by admin A. increase with rise in temperature B. decrease with rise in temperature C. will remain same D. depends upon altitude of experimentation
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________? April 17, 2025 by admin A. 12 B. 24 C. 5 D. 1100
In liquids and gases the current is due to the motion________________? April 17, 2025 by admin A. negative charges B. positive charges C. both negative and positive charges D. neutral particles
The graphical representation of Ohms law is___________________? April 17, 2025 by admin A. hyperbola B. ellipse C. parabola D. straight line
The resistance of a conductor at absolute zero (OK) is________________? April 17, 2025 by admin A. zero almost B. infinite almost C. no prediction at all D. may increase or decrease
