Question # 1

When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as.

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Photoelectric effect

Piezo electric effect

Thermionic emission

Secondary emission

Photons emitted in inner shell transition are.

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Continuous X -rays

Discontinuous X rays

Characteristic X rays

Energetic X rays

Electron volt is unit of:

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Chemical energy

Potential energy

Nuclear energy

heat energy

For Holography we use

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X ray

Laser

gama rays

Beta rays

The energy of 4th Orbit in hydrogen atom is.

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-2.51 eV

-3.50 eV

-13.60 eV

-0.85 eV

1 rad =

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0.001Gy

0.01Gy

0.1Gy

1.01Gy

In Helium Neon laser, discharge tube is filled with Neon gas.

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10%

15%

85%

90%

For Paschen series, the value of 'n' starts from

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2

4

6

8

The value of Rydberg constant is:

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1.0749x10⁷m^-1

1.0974 x 10⁷ m^-1

1.974 x10⁶m^-1

1.0974 x 10^-7 m^-1

First spectral series of hydrogen atom was discovered by

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Lyman

Rydberg

Balmer

Paschen

The rest mass x ray photon is

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Infinite

Zero

1.67 X^-17 kg

All of the above

In Helium Neon laser, the discharge tube is filled with

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80% He, 20% Neon

85% He, 15% Neon

83% He, 17% Neon

90% He, 10% Neon

X- ray diffraction reveals that these are

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Particle type

Wave type

Both wave and particle

None of above

Energy produced due to fission of uranium atom is:

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500MeV

200MeV

700MeV

750MEV

The first theory about the structure of an atom was introduced by

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Neil Bohr

Einstein

Compton

Rutherford

In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to:

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Infinite energy

Maximum energy

Minimum energy

Zero energy

Balmer Empirical formula explains the electromagnetic radiation of any excited atom in terms of their.

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Energy

Mass

Wave length

Momentum

The value of Rydberg constant is

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1.0974 x 10⁷ m^-1

1.0974 x 10^-7 m^-1

1.0974 x 10⁶ m^-1

1.0974 x 10^-6 m^-1

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