Question # 1

The working of cloud chamber is based in the presence of.

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Super heated vapours

Liquid

Super saturated vapors

Unsaturated vapours

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

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Electrons

Holes

Neutrons

Protons

The path of Gama rays in Wilson cloud chamber is

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Irregular

Dense and straight

Thin and continuous

Thin and discontinuous

Which one of the following quantities is conserved in a nuclear reactor.

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Energy only

Mass only

Momentum only

Mass energy and momentum

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

Which six particles and their antiparticles interact by the weak interaction.

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Leptons

Hadrons

Muons

pi mesons

The chain reaction is controlled by a series of rods usually made of.

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uranium

Cadimium

Boron

Steel

In order to reduce uncertainty in momentum one must use light of.

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Short wavelength

Large wavelength

Wavelength of intermediate value

Wavelength of any value

The converse of pair production is

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Annihilation of matter

Materialization

Compton effect

Photo electric effect

Choose the one which acts as single inverter.

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Common emitter

common collector

Common base

Diode

The most suitable material for moderator in a nuclear reactor is.

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B

Cd

D2O

Uranium

Which of the following detectors can count fast and operate at low voltage.

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G.M Counter

Cloud chamber

Solid state detector

Bubble chamber

One radian is equal to.

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0.1 Gy

0.01 Gy

0.001 Gy

0.0001 gy

Which particles have spin quantum number 1/2

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Mesons

Laptons

Hadrons

Muons

The SI unit of absorbed dose in.

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Bel

Weber

Rem

Grey

The ionization potential of hydrogen atom is.

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10.2 V

13.6 V

12.97 V

27.2 V

Atomic reactor is based on

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Controlled chain reaction

Uncontrolledly chain reaction

Nuclear fission

Nuclear fusion

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

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1536

1636

1736

1836

In a fission reactor which particle causes a uranium -235 nucleus to split.

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Alpha particle

Gama ray

Neutron

Proton

Nuclear force exists between

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Proton proton

Neutron -neutron

neutron -proton

All of these

Which of the following atom pair have the same structure.

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N, C

B, Li

H2 , Ne

Li , Na

Lines of Balmer series are emitted by hydrogen atom when the electron jumps from

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The first orbit to any other orbit

Higher orbits to second orbit

Higher orbits to first orbit

The third orbit to higher orbit

An AND gate is.

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Equivalent to a series switching circuit.

Equivalent to a parallel switching circuit

Equivalent ot universal gate

A reciprocal of NAND gate

The output of two input OR gate is zero only when its.

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Either input is one

Either input is zero

Both inputs are zero

Both inputs are one

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