Question # 1

Frequency of second pendulum is.

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0.5 Hz

1.0 Hz

1.5 Hz

2.0 Hz

The SI unit of spring constant is identical with that of.

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Force

Pressure

Surface tension

Loudness

Cs - 137 is a radioisotope used ot determine the thickness of the walls of steel pipes Cs 137 is chosen because it emits

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Radiowaves

Alpha particles

Beta particles

gama particles

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

A man in an elevator ascending with an acceleration will feel that his weight.

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Has increased

Has decreased

Remains the same

Vanishes

Who first discovered a similarity in nature of x rays and light rays.

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Roentgen

Bragg

Man Von Lave

Moseley

The international acceptable scientific notation of a number 123.4 is

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12.34 x 10¹

1.234 x 10²

1.234 x 10³

0.123 x 10³

Half life and mean lifetime of a radioactive element are.

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Equal to each other

Inversely proportional to each other

Directly proportional to each other

Not related to each other

Which quantity remains fixed in isobars.

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Mass number

Atomic number

Number of neutrons

Number of protons

Who discovered a phenomenon of thermos electricity.

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Peltier

Joule

Seeback

thomson

The shape of wave front depends on

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Density of medium

Shape of medium

Viscosity of medium

Length of medium

If a resistance is connected in parallel with a galvanometer the resulting instrument is called.

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A voltmeter

An ammeter

A wattmeter

A potentiometer

Which of the following is not the SI unit of magnetic flux density.

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Wb m2

N A-1 m-1

Tesla

N mA-1

During a thunderstorm, an observer sees a lighting flash Six second later he hears the thunder The speed of sound is 330 m s-1. Approximately how far away is the observer from the lighting.

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1/2 km

1/3 km

2 km

1/20 km

How many calories of heat are required to evaporate completely 1 g of ice at 0 ^oC

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480 calories

720 calories

940 calories

1170 calories

Which of the following is an example of irreversible process.

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Melting of ice

Work done against friction

Pettier heating and cooling

All isothermal and adiabatic changes

In a vacuum flask the vacuum prevents heat transfer by

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Radiation only

Conduction only

Convection only

Conduction and convection

The 'x' in X-rays means

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Xenon

Explosion

x for unknown

X makes the spot

Ebers-Moll model describes the working of a

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BJT

FET

MOSFET

UJT

X-rays are

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Longitudinal wave

Transvers waves

Secondary waves

Fast sound waves

The input exultation for a JFET is

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Current signal

Voltage signal

Voltage and current signals

Neither voltage nor current signal

Who is generally credited with the invention of first optical microscope.

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Hans Lippershery

Glavanni faber

Galileo

issac Newton

The energy supplied in charging a capacitor resides after the charging in.

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The magnetic field

The electric field

the battery

The moving conduction charges

Which analysis is employed to convert a complex sound into notes.

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Fourier theorem

Milleman theorem

Lissajoes theorem

Demorgan's law

Which one of the following is a convenient energy unit to express the energy of sub atomic particles.

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Joule

electron volt

Watt

Curie

As a positively charged rod is brought closer and closer to a positively charged electroscope the gold leaf.

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diverges

Converges

is neutralized

Is unaffected

An important application of the semi conductor is the

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Vacuum tube

Fluroescent tube

Copper oxide rectifier

Battery

Isotopes are the atoms of the same elements which contain equal number of.

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Nucleus

Neutrons

Protons

Electrons

Which onw of the following is deflected by an electric field.

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Alpha particles

Gama rays

Neutrons

x rays

Which of the following is a thermodynamic potential

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Internal energy

Enthalpy

Gibb's free energy

All of these

The maximum stress a solid material can sustain with out undergoing permanent deformation is called.

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elastic limit

Plastic

elastic deformation

Plastic deformation

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