Question # 1

Albert Einstein got noble prize for service in:

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Pair production

Annihilation of matter theory

Compton effect

Photoelectric effect

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

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Acceleration

Angular momentum

Linear momentum

Entropy

If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor.

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√2

1/√2

2

1/2

The materialization of energy take place in the process of.

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Photo electric effect

Compton Effect

Pair production

Annihilationof matter

Pair production can take place only when energy of radiation is equal and greater than 1.02 MeV, thus correct option is.

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X rays

Gama rays

Heat Radiation

Ultraviolet rays

A block body is an ideal:

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Absorber

Radiator

Both a & b

None of above

In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of.

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90^oC

Zero

120^oC

45^oC

Who explained the photo electric effect.

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Max Plank

Einstein

Henry

Rutherford

The number of electrons emitted depends upon

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Colour of target surface

Shape of surface

Frequency of incident light

Intensity of incident light

Max planck received noble prize in:

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1927

1932

1918

1914

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

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Compton effect

Pair production

Photoelectric effect

None of above

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Physics ICS Part 2 Chapter 19 Online MCQ's Test MCQs With Answers

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