Question # 1

Two electrons approach each other their relative velocity will be.

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Zero

c

c/2

Infinity

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

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

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Electrons

Holes

Neutrons

Protons

The force that bonds protons and neutrons together int he nucleus despite the electrical repulsion of the protons is called.

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Molecular force

Nuclear force

Atomic force

Gravitational force

The SI unit of current gain is.

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Ampere

Ampere metre

Ampere volt

It has no unit

Which given quantity remains the same in isotones.

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Mass number

Atomic number

Number of neutrons

Number of protons

Which experiment is a demonstration that matter and energy can display properties of both waves and particles.

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young's double slit experiment

Division germier experiment

Heisenberg's uncertainty experiment

Stern Gerlach experiment

Matter waves

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Are electromagnetic in nature

Travel with the speed of light

Can be diffracted

Are longitudinal waves

The continuous X rays spectrum is due to an effect.

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Bremsstrahlung

Breaking radiation

Holography

both a and b

48 days after the receipt the amount of iodine -131 left behind is only.

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0.1325 g

0.2135 g

0.3125 g

0.1235 g

When a posirtron is emitted it causes.

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Mass number to increase by one

mass number to decrease by one

Atomic number to decrease by one

Atomic number to increase by one

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

A single quantum of electromagnetic radiation is termed as.

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Compton

Photon

Hyperon

Meson

The average energy released per fission of U is about

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200 eV

2 keV

2 MeV

200 MeV

The photons emitted in inner shell transition are.

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Alpha particle

Beta particle

Gama particle

Characteristic X-rays

One rem is equal to.

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0.1 Sv

0.01 Sv

0.001 Sv

0.0001 SV

The total number nucleons in a nucleus are called.

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Mass number

Atomic number

Neutron number

Isotopes

Which of the following is not an electromagnetic wave.

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game rays

Ultraviolet rays

Ultrasonic waves

Microwaves

Transistors with various combinations are widely used as switches in.

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electric generators

Rectificers

Amplifiers

Computers

Which one the following is not a component of a Bipolar junction Transistor

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Base

Emitter

Collector

Grid

A unijunction transistor

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Has only one junction

Is a two terminal device

Is fabricated from germanium

Is fabricated fromuranium

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