Photoelectric effect was given by ____________________?

A. Hertz
B. Fresnel
C. Einstein
D. Plank

Longitudinal waves do not exhibit _____________________?

A. Reflection
B. Refraction
C. Diffraction
D. Polarization

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

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

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