Question # 1

Which of the following is formed by decay of a free neurton.

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A number of electrons

Two protons

A proton and an electron

An alpha particle

The maximum energy of emitted photoelectron is measured by

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the largest potential difference they can traverse

The current they produce

The potential difference they produce

The speed with they emerge

The simple form of particle accelerator is.

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Cathode ray tube

Oscillator

_Amplifier

Phase locked loop

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

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B

Cd

D2O

Uranium

The electrons behave as wave because.

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They can be diffracted by a crystal

They can be defecting by magnetic field

They can be deflecting by electric field

they can produce ions in gases

X-rays are

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Longitudinal wave

Transvers waves

Secondary waves

Fast sound waves

The resistance between(+) and (-) inputs of an amplifier is.

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Zero

Low

High

Infinity

Which animal did Erwin Schrodinger contemplate using in his famous thought experiment.

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mouse

Cat

Dog

Rabbit

Transistor stands for

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Transfer of resistance

Transfer of current

Transfer of power

Transfer of voltage

The splitting of atomic energy levels and the associated spectrum lines when the atoms are placed in a magnetic field is called.

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The photoelectric effect

The zeeman effect

The Compton effect

Quantum effect

Marie Curie and Pierre Curie discovered two new radioactive elements which are.

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Uranium and radkum

Platinum and radium

Polonium and radium

Crypton and radon

Hydrogen bomb is based on

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Controlled chain reaction

Uncontrolled chain reaction

Nuclear fusion

Nuclear fission

Which of the following is not a mode of radioactive decay

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Nuclear fusion

Alpha decay

Electron capture

Positron emission

What is the overall gain, if three amplifiers each with a gain of 30 are cacaded.

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30

90

270

27,000

Positron are produced during.

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Annihilation

ionization

Pair production

x rays production

Which experiment confirmed the de Broglie hypothesis.

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Double slit experiment

Division germier experiment

Schrodinger's Cat experment

Bohr's experiment

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

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Electrons

Holes

Neutrons

Protons

The X-rays coming from a X-rays tube

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Is monochromatic

Has all wavelengths smaller than a certain maximum wavelength

Has all wavelengths greater than a certain maximum wavelength

has all wavelengths minimum than a certain maximum wavelength

Which is the famous standard model of the universe.

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the big bang

Casmos

Astronaut

The small stap

The half life of a radioactive substance depend on.

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Pressure

Temperature

Amount of substance

No external influences

When of the following radiations are not emitted by electron transitions in atoms.

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Visible rays

Ultraviolet rays

Infrared radiations

Alpha particles

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