Proton electron neutron and a particles have same momentum. Which of them have highest K.E ?

A. Proton
B. Electron
C. Neutron
D. A-particle

Work done by variable force is determine by dividing____________________?

A. Force into small interval
B. Displacement into small interval
C. Both force and displacement into small intervals
D. Force into small and displacement into large intervals

The escape velocity of a body in gravitational field of earth is independent of__________________?

A. Its mass
B. The angle at which it is thrown
C. Both its mass and the angle at which it is thrown
D. Gravitational field of earth

The source of geothermal energy is___________________?

A. Decay of radioactive element in the earth
B. Compression of material in the earth
C. Residual lost of the earth
D. All as said in a – b and c

Work done by the force of friction is____________________?

A. Always positive
B. Always negative
C. Positive only for small frictional force
D. Positive only for large frictional force

If velocity is doubled then__________________?

A. Momentum increases 4 times and k.e increases 2 times
B. Momentum and k.e. remain same
C. Momentum increases 2 times and k.e increases constant
D. Momentum increases 2 times and k.e increases 4 time

Which of the following is not conservative force_________________?

A. Friction
B. Electric
C. Gravitational
D. Magnetic

The consumption of energy by a 60 watt bulb in 2 sec is_________________?

A. 120 j
B. 60 j
C. 30 j
D. 0.02 j

The escape velocity form the earth surface in km S-1 is____________________?

A. 4.2 km s-1
B. 7.5 km s-1
C. 9.5 km s-1
D. 1.1 km s-1

Light on passing through a Polaroid is ___________________?

A. Plane polarized
B. Un-polarized
C. Circularly polarized
D. Elliptically polarized