Question # 1

The result of the alpha particle scattering experiment gave evidence for which of the following.

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Nuclear fusion

Radio active decay

Existence of isotopes

Nuclear atom

The process by which nuclei emit a ,b and gama rays in order to attain stability is called.

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Radioactive disintegration

Radio activity

B decay

Radioactive transmulation

In Compton's effect it was considered that X-rays consist of

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Electrons

Holes

Neutrons

Protons

Magnetic field does not cause deflection in

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Alpha particle

Beta minus particles

Beta plus particles

Gama rays

Phenomenon of radioactivity is due to disintegration of.

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Proton

Neutron

electron

nucleus

Alpha particles emitted from a radioactive material are.

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He nucliei

H -nucliei

Li nucliei

B nucliei

Which of the following has the highest relative biological effectiveness or the quality factor.

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X rays and Gama rays

Electrons

Photons

Alpha particles

The chemical behavior of an atom is determined by

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Mass number

Number of Isotopes

Atomic number

Binding energy

A darling ion amplifier is characterized by

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High voltage and current gain

High input resistance and current gain

High output resistant and current gain

Low input resistance and current gain

X-rays are

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Longitudinal wave

Transvers waves

Secondary waves

Fast sound waves

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

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

The bunding energy per nucleon for iron is.

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zero

Maximum

Negative

Minimum

During transition, atom cannot emit

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Visible light

Ultraviolet radiation

Infrared radiations

gama rays

The capture of neutron by a proton results in the formation of.

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Deuteron and gama rays

Deuteron and alpha particle

Triton and Beta particles

Tritron and X rays

An Alpha particle is the same as

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A helium nucleus

A high speed electron

A hydrogen nucleus

Electromagnetic radiation of short wavelength

Which type of amplifier causes minimum drain of power supply.

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Class -A

Class -B

Class-C

Class -AB

Ebers-Moll model describes the working of a

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BJT

FET

MOSFET

UJT

Which given quantity remains the same in isotones.

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Mass number

Atomic number

Number of neutrons

Number of protons

The phenomenon of Compton's effect process that right has

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Wave nature

Particle nature

Dual nature

Corpuscular nature

In a cloud chamber the Alpha particles leave

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Dense, straight and continuous tracks

Only straight and continuous tracks

Thin and discontinuous tracks

Irregular tracks

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