Question # 1

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

The mass of proton is equal to.

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1.673 x 10^-27 kg

1.673 x 10²⁷ kg

9.1 x 10-31 kg

9.1 x 10³¹ kg

The Beta particles move along.

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Straight path

Curved path

Zig Zag path

Circular path

Positron are produced during.

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Annihilation

ionization

Pair production

x rays production

Special theory of relativity deals with the events in the frames of reference which move with constant.

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Time interval

Acceleration

Momentum

space interval

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

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

When we pass a radiation from a radioactive material through an electric field.

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All three kinds of rays will be deflected

Only the Gama rays are deflected

The Alpha and Beta particles are deflected

Only the alpha particles are deflected

Which particle interact via all fundamental forces.

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Leptons

Hadrons

Muons

mesons

The strength of photo electric current depends upon.

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Intensity of incident light

Frequency of incident light

Angle of incident light

Distance between anode and cathode

In order to reduce uncertainty in momentum one must use light of.

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Short wavelength

Large wavelength

Wavelength of intermediate value

Wavelength of any value

Which of the following phenomenon cannot be understood by quantum theory.

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Photo electric effect

Compton effect

X-Rays production

Interference

the gain of an amplifier is independent of

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The two externally connected resistances

What is happening inside the amplifier

Internal structure of the amplifier

All of the above

Which of the following is its own anti particle.

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Photon

Electron

Proton

positron

The half life of a radioactive element depends upon.

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Temperature

pressure

nature of element

quantity of the element

Which of the following is not a mode of radioactive decay

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Nuclear fusion

Alpha decay

Electron capture

Positron emission

The advantage of electron tube over semiconductor is.

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_{its efficiency}

its unlimited type

Its low consumption power

That it takes no warming up time

A unijunction transistor

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Has only one junction

Is a two terminal device

Is fabricated from germanium

Is fabricated fromuranium

Low frequency response of an amplifier is mainly limited by.

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Biasing configuration

Coupling capacitor

By pass capacitor

Input impedance

Transistors with various combinations are widely used as switches in.

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electric generators

Rectificers

Amplifiers

Computers

When Be is bombarded by alpha particles, then we obtain

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electron

Proton

Positron

Neutron

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