How much heat does a 40 W bulb generates in one hour ?
A. 144000J
B. 144J
C. 1.44J
D. 14J
Physics MCQs with Answers
Resistance of a super conductor is ______________________?
A. finite
B. infinite
C. zero
D. changes with every conductor
Which one is the best material for making connecting wires ?
A. iron
B. tungsten
C. silver
D. copper
Internal resistance is the resistance offered by________________?
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 ?
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_________________?
A. increase with rise in temperature
B. decrease with rise in temperature
C. will remain same
D. depends upon altitude of experimentation
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
The graphical representation of Ohms law is___________________?
A. hyperbola
B. ellipse
C. parabola
D. straight line
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
