Question # 1

The phenomenon of Compton's effect process that right has

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Wave nature

Particle nature

Dual nature

Corpuscular nature

Which experiment confirmed the de Broglie hypothesis.

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Double slit experiment

Division germier experiment

Schrodinger's Cat experment

Bohr's experiment

The average energy released per fission of U is about

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200 eV

2 keV

2 MeV

200 MeV

The process of pair production will take place if the energy of photon is greater than

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0.21 MeV

0.51 MeV

1.51 MeV

1.21 MeV

The half life of uranium -238 is

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1620 years

4.5 x 10⁹years

3-8 days

23.5 minutes

If we use two diodes and a centre tapped transformer we eill get

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Transistor

Amplifier

Half wave rectifier

Full wave rectifier

The emission of Beta particle from protonium -218 results in the formation of.

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Protactinium -231

Thorium -232

Astatine -218

Radon -222

The ionization energy for hydrogen atom is

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-11.6 eV

-12.6 eV

-13.6 eV

-19.6 eV

At what speed the mass of a body will be doubled.

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0.67 C

0.77 C

0.87 C

0.97 C

Which of the following particles leave no trail in a cloud chamber.

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Electrons

Protons

Alpha particles

Neutrons

How much large is the proton mass than the electron mass.

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1536

1636

1736

1836

LASER beam my be measure very large distance because it is.

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Inidirectional

coherent

Monochromatic

Not absorbed

Which circuit elements has two stable states and can be used to store information.

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Flip flop or latch

Logic gate

Oscillator

Amplifier

When an object moves with a very high speed the length in the direction of motion.

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Contracts

Expands

Remains the same

Becomes infinity

The gama rays have

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Thin tracks

Thick tracks

No definite tracks

Continuous tracks

Which given quantity remains the same in isotones.

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Mass number

Atomic number

Number of neutrons

Number of protons

X-rays are not used in RADARs because

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They are not reflected by the target

they are not completely absorbed by air

They damage the target

They are reflected by the target

A single quantum of electromagnetic radiation is termed as.

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Compton

Photon

Hyperon

Meson

The change in wavelength of an X-ray when scattered from an electron is called.

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Compton shift

Doppler shift

Stefan's law

Fraunhofer lines

Negative feedback

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Increases stability

Decreases stability

Produces oscillatory

Cannot occur

Photocells are used for

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Security systems

Counting systems

Automatic door system

All of the above

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