Question # 1

Which of the following is deflected by an electric field.

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Alpha particles

X rays

Gama rays

Neutrons

The nucleus of tritium is called.

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Proton

Triton

Deuleron

Positron

A logic circuit whose output signal is '1' when inputs are different is.

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NAND gate

NOR gate

Exclusive OR gate

Exclusive NOR gate

Which is the famous standard model of the universe.

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the big bang

Casmos

Astronaut

The small stap

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

As oscillator is basically an amplifier with loop gain

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Zero

Infinity

Less than unity

More than unity

A transistor consists of.

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One p-n junction

Two p-n junctions

Three p-n junctions

Four p-n junction

How positives feedback will effect an amplifier.

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Increases the voltage gain

Decreases the voltage gain

Imitates oscillation to occur

Damaged it

In the experiment of photo electric effect the minimum frequency of photons at which electrons are emitted from a metal surface is called.

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Critical frequency

Typical frequency

Threshold frequency

Surface frequency

The transition of inner shell electrons in heavy atoms gives rise to the emission of.

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Low energy b-particle

High energy b-particle

High energy X- rays

High energy gama rays

Which type of radiation would be stopped completely by a thin piece of cardboard.

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Alpha particles

Beta particles

Gama rays

X -rays

An emitter follower has

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High input impedance and high output impedance

High input impedance and low output impedance

Low input impedance and low output impedance

Low input impedance and high output impedance

Why transistor is preferred to triode valve for use as an amplifier.

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Because it can handle large power

Because it has higher input impedance

Because it has higher voltage gain

Because it has lower voltage gain

The binding energy to pull the deuterium H apart into a proton and a neutron is equal to.

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1.22 MeV

2.22 MeV

3.22 Mev

4.22 MeV

The half life of a radioactive element depends upon.

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Temperature

pressure

nature of element

quantity of the element

A newly prepared radioactive nuclide has a decay constant Lamda of 10-6 s-1 What is the approximate half life of the nuclide.

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1 hour

1 day

1 week

1 month

X-rays travel with

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The speed of light

The speed of sound

The speed of 3,000 m s-1

The speed of 3,500 m s-1

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 Nuclear reactor which material is often used as modeerator.

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Water

Graphite

Uranium

Water and graphite

The most abundant isotope of neon is.

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Neon -20

Neon -21

Neon -22

Both a and c

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

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