Question # 1

In 1905, the special theory of relativity was proposed by

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Einstein

Bohr

Maxwell

De Broglie

Anti particle of electron is

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Proton

Photon

Neutron

Positron

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

Compton shift is maximum for scattering angle of photon

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0^o

90^o

180^o

45^o

The uncertainty principle was given by

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De-Broglie

Heisenberg

Einstein

Max Planck

If the energy of photon is 10 eV and work function is 5 eV, then the a value of stopping potential will be

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50 V

2 V

5 V

15 V

Photo electrons are emitted y using visible light when the metal is.

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sodium

Copper

Nicked

Cobalt

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

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JC

J/C

JS

J/S

The value of Wien's constant:

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2.9x10^-3mk

2.19x10^-7mk

3.18 x10⁶ km^-1

6.21 x 10^-9m²wk³

The maximum kinetic energy of emitted photo electrons depends upon.

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The intensity of incident light

Frequency of the incident light

Metal surface

Both frequency of incident light and metal surface.

The special theory of relativity based on.

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One postulate

Two postulates

Three postulates

Four postulates

Platinum wire becomes yellow at a temperature of.

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900^oC

1300^oC

1600^oC

500^oC

An electron miroscope emplys which to one of the following particles?

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Electron ahve a wave nature

Electrons can be focused by an electric field

Electrons can be focused by a magnetic field

All of the above

The physical quantity related to photon, that does not change in Compton scattering is.

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Energy

Speed

Frequency

Wavelength

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

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10 J

1.6 X 10^-18 J

1.6 X 10^-19 J

1.6 X 10³⁰ J

Light of 4.5 eV is incident on a Cesium surface and stopping potential is 0.25 eV, maximum K.E. of emitted electron is.

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4.5 eV

4.25 eV

4.75 eV

0.25 eV

Compton's effect is associated with

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gamma rays

Beta rays

X rays

Positive rays

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

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500^oC

900^oC

1100^oC

1300^oC

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

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