Question # 1

Which of the following is required for maintaining sustained chain reaction.

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Neutrons

Protons

Electrons

Photons

In electromagnetic spectrum X-rays are next to.

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Water waves

Radio waves

ultraviolet waves

Infrared waves

The input resistance of a JFET is of the order of.

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1 M Mega

10 M Mega

100 M Mega

1,000 M Mega

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

Which of the following is the most commonly used regions of operations for a transistor.

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Cut off

Saturation

Active

All of these

In a transistor which one is very thin.

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Collector

Emitter

Base

Depletion region

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

Which of the following atom pair have the same structure.

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N, C

B, Li

H2 , Ne

Li , Na

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

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Leptons

Hadrons

Muons

pi mesons

The phenomenon of radioactivity is associated with

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Decay of nucleus

Decay of atoms

Fusion of nuclei

Emission of electrons

A solid state detector is basically

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A reverse biased p-n junction

A forward biased p-n junction

A p-n -p transistor

A n-p-n transistor

The SI unit of equivalent dose is

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Seivert

Gray

Radian

Rem

Two electrons approach each other their relative velocity will be.

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Zero

c

c/2

Infinity

The electrons behave as waves, because they can .

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Produce ions in gases

Diffracted by a crystal

Be deflected by electric fields

Be deflected by magnetic fields

The term used for the emission of electrons when light strikes a surface.

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The zeeman effect

The photo electric effect

Skin effect

Compton effect

Deuterium is

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A transuranic element

A type o cosmic particle

An isotope of hydrogen

An isotope of helium

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

Which one of the following has maximum frequency.

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Visible light

Gama rays

Ultraviolet rays

Infrared rays

The most familiar example of radioactive dating is.

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Nitrogen dating

Carbon dating

Hydrogen dating

Helium dating

Which of the following can be used as an arrester in a nuclear reactor.

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Graphite

heavy water

Uranium

Cadmium

A deuteron is

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A type of proton

A proton neutron bounded to gather.

A type of beta particle

A type of neutron

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