MCQS of Physics for NTS Set 1

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MCQS of Physics for NTS


Which of the following particle would experience the largest magnetic force when projected with the same velocity perpendicular to a magnetic field?
Proton
He+
Electron
Li+

A bullet is short from a rifle. As a result the rifle recoils, The kinetic energy of rifle as compared to that of bullet is
Cannot be concluded
Less
Equal
Greater

One cannot see through fog because
Light is scattered by the droplets in fog
Light suffers total reflection at the droplet in a fog
The refractive index of fog is infinity
Fog absorbs light

With the propagation of a longitudinal wave through a material medium the quantities transmitted in the propagation direction are
Energy momentum and mass
Energy and linear momentum
Energy and mass
Energy

A conducting wire is drawn to double its length Final resistivity of the material will be
One-fourth of the original one
Half of the original one
Same as original one
Double of the original one

A particle moves along a circular path under the action of a force. The work done by the force is
None of them
Negative and non zero
Zero
Positive and non-zero

Two points charges A and B separated by a distance R attract each other with a force of 12 x 10-3 N. The force between A and B when the charges on them are doubled and distance is halved
1.92 N
12 N
19.2 N
0.192 N

A piece of fuse wire melts when a current of 15 ampere flows through it.With this current, if it dissipates 22.5 W. the resistance of fuse wire will be
Zero
1 ?
10 ?
0.10 ?

A monochromatic source of light is placed at a large distance d from a metal surface Photoelectrons are ejected at rate n,kinetic energy being E. If the source is brought nearer to distance d/2, the rate and kinetic energy per photoelectron become nearly
4n and 4e
N and 4E
2n and 2E
4n and E

When the displacement is half of the amplitude the ratio of potential energy to the total energy is
1/4
1
1/2
1/8

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