Question # 1

The input exultation for a JFET is

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Current signal

Voltage signal

Voltage and current signals

Neither voltage nor current signal

The energy in electron volts necessary to remove the most loosely bound electron from the neutral atom is known as.

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Faraday energy

Wave number

Ionization Potential

Excitation potential

Which one of the following spectra series is in the ultraviolet region.

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Lyman series

Paschen series

Brackett series

Plund series

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

The unit generally used for measuring astronomical distances is.

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Parsecs

Light year

Metre

Kilometer

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 gama rays have

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Thin tracks

Thick tracks

No definite tracks

Continuous tracks

The nucleus of tritium is called.

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Proton

Triton

Deuleron

Positron

Beta decay may occur by

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Beta minus

Beta Plus

Electron capture

All of these

Particle which can be added to the nucleus of an atom with changing its chemical properties are called.

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Electrons

Protons

Neutrons

Alpha particles

A freshly made sample of radioactive material gives a count rate of 8,000 counts per minute After twenty days it gives a count rate of 500 counts per minute What is the half life of the materials.

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5 days

10 days

40 days

20 days

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 bunding energy per nucleon for iron is.

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zero

Maximum

Negative

Minimum

The two elements with same number of electrons but different mass number are called.

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Isotones

Isobars

Isotopes

Isomers

What is the basic advantage of class A operation of an amplifier.

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It has high efficiency

It has high gain

It has low distortion

It has high distortion

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

The continuous x rays spectrum is obtained due to

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Deceleration of impact electrons

Breaking potential

Excitation potential

Ionization potential

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

X-rays used for

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Cutting boring and precision welding

Retina stitching in eye operations

Detecting heavy elements under the earth

Deflecting flaws in welding and casting

Which of the following is invariant under Galilean transformation.

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Velocity

Impulse

Momentum

Distance

The phenomenon of Compton's effect process that right has

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Wave nature

Particle nature

Dual nature

Corpuscular nature

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