Question # 1

Compton effect proves.

Choose an answer

Wave nature of radiation

Wave nature of particle

Dual nature of particle

Particle nature of radiations

When the K.E. of photoelectric is zero, the frequency of incident photon is.

Choose an answer

Less than

greater than

Equal to

Much greater

Which one of the following paved the way for modern physics

Choose an answer

Newtonian mechanics

Theory of relativity

Quantum theory

All of above

The photon with energy greater than 1.02 MeV can interact with matter as.

Choose an answer

Photoelectric effect

Compton effect

Pair production

annihilation of matter

The minimum energy required for occurrence of pair production is:

Choose an answer

1.022eV

1.02keV

1.02Me.V

1.04MeV

The stopping potential for a certain metal is 10 volts. Thus work function for the cathode is.

Choose an answer

10 J

1.6 X 10^-18 J

1.6 X 10^-19 J

1.6 X 10³⁰ J

Choose an answer

Wien's constant

Planck's constant

Davison constant

Lumber's constant

Pair production cannto take place in vacuum because :

Choose an answer

Mass in not conserved

Momentum is not conserved

Energy is not conserved

Charge is not conserved

Which one of the following physical quantities change with relativistic speed?

Choose an answer

Length

Time

Mass

All of above

The converses of annihilation of matter is:

Choose an answer

Photoelectric effect

Relativistic effect

Pair production

Compton effect

The unit of Plank's constant 'h' is.

Choose an answer

JC

J/C

JS

J/S

The minimum frequency needed to emit an electron form metal surface is called:

Choose an answer

Work function

Threshold frequency

Quanta frequency

All of above

The wavelength associated with the protons moving at speed of 40 m/s is.

Choose an answer

7.20 nm

9.02

15.7 nm

17.3 nm

unit of Plank's constant is same as that of.

Choose an answer

Acceleration

Angular momentum

Linear momentum

Entropy

Platinum wire becomes white at a temperature of.

Choose an answer

1600^oC

1300^oC

1100^oC

900^oC

The emission of electrons from metal surface when exposed to light is called:

Choose an answer

Compton effect

Pair production

Photoelectric effect

None of above

Number of electros emitted in photo electric effect depend upon.

Choose an answer

Intensity of incident light

Frequency of incident light

Energy of incident light

Wavelength of incident of light

Energy of Black body radiation depends upon

Choose an answer

Nature of surface of body

Nature of material of body

Shape and size of body

Temperature of the body

More Classes

Other Links

Physics FSC Part 2 Chapter 19 Online MCQ's Test 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

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer