Question # 1

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

A device used to determine mass of an isotope quite accurately is known as.

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Spectrometer

Mass spectrometer

Mass detector

Electronic balance

The total number nucleons in a nucleus are called.

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Mass number

Atomic number

Neutron number

Isotopes

The part of theory of relativity which deals with accelerated bodies is called.

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special theory of relativity

General theory of relativity

Lorentz's theory of relativity

Galilean theory of relativity

Choose the one which acts as single inverter.

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Common emitter

common collector

Common base

Diode

Cosmic rays mostly comprise of

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Neutral particles

Negative charged particles

Positively charged particles

Ions

When a platinum wire is heated of 1600^oC, it becomes

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orange

Cherry red

Dull red

White

The most readily fissionable isotope of uranium has atomic mass of

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234

235

236

238

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

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Leptons

Hadrons

Muons

pi mesons

The binding energy per nucleon for uranium is about.

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7.7 MeV

9.6 MeV

13.6 MeV

21.6 MeV

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

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Base

Emitter

Collector

Grid

In an electronic transition atom cannot emit

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Gama rays

Visible rays

Infrared rays

Ultraviolet rays

The phenomenon is which the wavelength of scattered X-rays is larger than the incident X-rays is known as.

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Zeeman's effect

Photoelectric effect

Compton's effect

Annihilation of matter

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

Which of the following is basic transistor configuration.

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CB

CC

CE

All of these

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

The critical mass of fissionable uranium -235 can be reduced by

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Adding impurities to it

Heating the material

surrounding it by neutron reflecting material

Surrounding it by neutron absorbing material

A single quantum of electromagnetic radiation is termed as.

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Compton

Photon

Hyperon

Meson

A logic circuit with one input and one output that inverts the input signal at the output is.

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AND gate

NOT gate

OR gate

NOR gate

An operational amplifier have how many input terminals.

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One

Two

Three

Four

What is the effect of electric and magnetic fields on X-rays

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X-rays are deflected

X-rays are not deflected

X-rays are sometimes deflected and sometimes not

Nothing can be said

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