Question # 1

One gray is equal to.

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1 J-1 kg -1

1 J -1 kg -2

1 J 1 -g-1

1 j kg -2

Which of the following is believed to be carrier o nuclear forces.

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Lepton

Meson

Bason

Baryon

The splitting of atomic energy levels and the associated spectrum lines when the atoms are placed in a magnetic field is called.

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The photoelectric effect

The zeeman effect

The Compton effect

Quantum effect

The mass of an helium nucleus is equal to.

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2.0015 u

3.0015 u

4.0015 u

5.0015 u

The unit of Rydberg constant R is

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m

m3

m^-1

m-2

Which of the following is deflected by an electric field.

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Alpha particles

X rays

Gama rays

Neutrons

Cosmic rays mostly comprise of

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Neutral particles

Negative charged particles

Positively charged particles

Ions

The rest mass of a particle is independent of the

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Wavelength of the particle

Mass of the particle

Speed of the particle

Energy of the particle

Which experiment confirmed the de Broglie hypothesis.

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Double slit experiment

Division germier experiment

Schrodinger's Cat experment

Bohr's experiment

A body moves with velocity of 2 x 10⁶ m s-1 its relativistic mass becomes

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Zero

Unity

Double of its rest mass

Infinity

When a helium atom loses an electron it becomes.

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An a particle

A proton

A positive helium ion

A negative helium ion

The molecular weight of D2O is

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16

18

20

24

Compton scattering experiment seemed to indicate that radiation had

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Wave nature

Particle nature

Wave particle nature

X-rays nature

The mass defect of Bohr's atomic model is

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Exclusion of nuclear motion

missing of classical and quantum theories

Failed to explain the fine structure of spectral line

All of the above

Which of the following is basic transistor configuration.

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CB

CC

CE

All of these

The half life of radium -226 is

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1620 years

45 x 10⁹ years

3.8 days

23.5 minutes

Which of the following phenomenon is observed in obtaining an X ray photograph of our hand.

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Photoelectric effect

Zeeman effect

Shadow photography

Ionization

Besides U ²³⁵ what else is needed for making as atomic bomb.

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Electons

Protons

Neutrons

Photons

White light a tungsten filament lamp is passed through sodium vapor and viewed through a diffraction gritting Which of the following best describes the spectrum which would be seen.

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Coloured lines on a black background

Coloured lines on a white background

Dark lines on a coloured background

Dark lines on a white background

Which animal did Erwin Schrodinger contemplate using in his famous thought experiment.

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mouse

Cat

Dog

Rabbit

X-rays travel with

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The speed of light

The speed of sound

The speed of 3,000 m s-1

The speed of 3,500 m s-1

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