Question # 1

The quantity/factor h/m_oc has the dimensions of.

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Length

Time

Mass

Energy

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

Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

Einstein was awarded Nobel prize in physics in

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1905

1911

1918

1921

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 existence of positron was discovered in:

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1929

1928

1931

1933

Minimum energy needed to escape an electron ofrm metal surface is called:

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Threshold energy

Threshold frequency

Work function

Work ability

When platinum is it becomes orange at

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500^oC

900^oC

1100^oC

1300^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

If an object moves with speed of light, its mass will be.

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Zero

Maximum

Minimum

infinity

The photoelectric effect predicts that light is made of

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Photons

Neutrons

Protons

None of these

Platinum wire becomes white at a temperature of.

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1600^oC

1300^oC

1100^oC

900^oC

The uncertainty principle was given by

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De-Broglie

Heisenberg

Einstein

Max Planck

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

In Compton effect the photon behaves as a.

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Wave

Particle

Nucleon

Both a and b

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

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 value of Stefan is constant is:

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4.57 x 10^-8 m²k²

5.67 x10^-8 wm^-2k^-4

6.67x 10^-11 wm²k⁴

7.45 x 10^-9 m² wk³

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