Question # 1

The essential distinction between X-rays and y-rays is that

Choose an answer

y-rays have smaller wavelength than X-rays

y-rays emanate from nucleus while X-rays emanate from outer part of the atom

y-rays have greater ionizing power than X-rays

y-rays are more penetrating than X-rays

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by monochromatic blue light of the same intensity

Choose an answer

Fringe width will decrease

Fringe width will increase

The fringe width will remain unchanged

Fringes will become less intense

Which of the modulus of elasticity is involved in compressing a rod to decrease its length?

Choose an answer

Young's modulus

Bulk modulus

Modulus of rigidity

None of the above

The frequency of the incident light falling on a photosensitive metal plate is doubled the kinetic energy of the emitted photoelectrons is

Choose an answer

Double the earlier value

Unchanged

More than doubled

Less than doubled

The dimensional formula for the modulus of elasticity is same as that for.

Choose an answer

Stress

Strain

Velocity

Surface tension

To make the frequency double of na oscillator we have to

Choose an answer

Double the mass

Half the mass

Quadruple the mass

Reduce the mass to one-fourth

Which of the following is not thermo dynamical function?

Choose an answer

Enthalpy

Work done

Gibb's energy

Internal energy

Planck's constant has the dimensions of:

Choose an answer

Energy

Momentum

Frequency

Angular momentum

Relation between pressure (P) and energy (E) of a gas is

Choose an answer

P = 2/3 E

P = 1/3 E

P = 3/2 E

P = 3 E

In which case dose the potential energy decreases?

Choose an answer

On compressing a spring

On stretching s spring

One moving a body against gravitational force

One the rising of an air bubble in water

What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value the mass remaining constant?

Choose an answer

12

6

3

2

More Classes

Other Links

NAT I Engineering Physics MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer