Question # 1

Photodiode is used for wave nature of.

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Light

Thermal radiation

Radi waves

Sound waves

Energy of Black body radiation depends upon

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Nature of surface of body

Nature of material of body

Shape and size of body

Temperature of the body

The mass of an object will be doubled at speed.

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2.6 x 10⁸ m/s

1.6 x 10⁸m/s

2.6 x 10⁷m/s

3.6 x 10⁷ m/s

The materialization of energy take place in the process of.

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Photo electric effect

Compton Effect

Pair production

Annihilationof matter

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

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Work function

Threshold frequency

Quanta frequency

All of above

The energy of the photon of wavelength 500 nm is.

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3.10 eV

2.49 eV

1.77 eV

1.52 eV

The Compton effect is associated with

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X-rays

y-rays

Positive rays

ß-rays

Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

All motions are

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Absolute

Uniform

Relative

Variable

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

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Length

Time

Mass

All of above

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

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JC

J/C

JS

J/S

1 kg mass will be equivalent to energy.

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9 x 10⁸ J

9 X 10¹² J

9 X 10¹⁶ J

9 X 10¹⁹ J

When platinum is it becomes orange at.

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500^oC

900^oC

1100^oC

1300^oC

Compton shift is maximum for scattering angle of photon

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0^o

90^o

180^o

45^o

Pair production cannto take place in vacuum because :

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Mass in not conserved

Momentum is not conserved

Energy is not conserved

Charge is not conserved

We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to:

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Uncertainity Priciple

De-broglie Theory

Einstin Theory

Photo electric effect

The concept of direction is purely

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Relative

Absolute

Relative to the motion

None of these

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

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