Question # 1

De-Broglie waves are associated with

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Moving charged particles only

Moving neutral particles only

All moving particles

All parties whether in motion or at rest

When platinum is it becomes orange at

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500^oC

900^oC

1100^oC

1300^oC

When platinum wire is heated, it changes to cherry red at temperature.

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500^oC

900^oC

1100^oC

1300^oC

Wave nature of light appears in

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Pair production

Compton effect

Photo electric

Interference

When platinum is it becomes orange at.

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500^oC

900^oC

1100^oC

1300^oC

Unit of Stephen's constant is

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W m K^-2

W m^-2 K^-4

W m K^-4

None

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

Pair production occurs only when energy of photon is at least equal in:

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1.02keV

1.02 eV

1.02 MeV

1.02 GeV

When platinum is heated is become dull red at:

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900°C

500°C

800°C

1100°C

Earth orbital speed is.

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10 km/s

20 km/s

30 km/s

40 km/s

Platinum wire becomes white at a temperature of.

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1600^oC

1300^oC

1100^oC

900^oC

Internal frame is a frame is which

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1st law holds

2nd law holds

3rd law holds

Kelvin's law holds

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

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Wien's constant

Planck's constant

Davison constant

Lumber's constant

Which is the most refined form of matter.

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Smoke

Fog

Light

Electron

Eintein's Photoelectric equation is E_k= hf -∅ in this equation E₁, refers to:

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K.E of al the emited electrons

Mean K.E of emited electrons

Maximum K.E of emited electrons

Minimum K.E of emited electrons

The converses of annihilation of matter is:

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Photoelectric effect

Relativistic effect

Pair production

Compton effect

Compton shift is maximum for scattering angle of photon

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0^o

90^o

180^o

45^o

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

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