Question # 1

The ratio of stress to strain is called.

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Bulk modulus

Young's modulus

Modulus of elasticity

Shear modulus

Lagging of magnetic flux density behind magnetic field is known as.

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Permeability

Susceptibility

Hysteresis

Uncertainty

A fixed mass of an ideal gas absorbs 1000 J of heat and expands under a constant pressure of 20 kPa from a volume of 25 x 10-3 m3 to a volume 50 x 10-3 The change internal energy of the gas is.

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500 J

1000 J

-1000 J

Zero

Which of the following quantities has three significant figures.

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3.0066 m

5.05 x 10^-27 kg

301.0 s

1.009 m

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

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Fourier theorem

Milleman theorem

Lissajoes theorem

Demorgan's law

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

If each particle of the fluid passing through a point follows the same path then flow is said to be

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Regular flow

Irregualr flow

Turbulent flow

Streamline flow

Besides U ²³⁵ what else is needed for making as atomic bomb.

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Electons

Protons

Neutrons

Photons

Light wave are

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Longitudinal

Transverse

Sometimes longitudinal and sometimes transverse

Neither longitudinal nor transverse

A LASER beam may be used to measure very large distance because it is.

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Unidirectional

Coherent

Monochromatic

Massive

Fiber optics system can be used for.

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Word processing

Image processing and receiving

Image transmitting

All of the above

Which of the following atom pair have the same structure.

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N, C

B, Li

H2 , Ne

Li , Na

To produce beats it is necessary to use two waves.

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Travelling in opposite direction

Of slightly different frequencies

Of equal wavelengths

Of equal amplitudes

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

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 zero point of Kelvin scale is called.

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Critical point

Terminal point

Absolute zero

Mid point

Which of the following is dimensionless.

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Strain

Stress

Pressure

Volume

The real depth of a swimming pool is 2 m What is the apparent depth of the pool if the refractive index of water is 1.33

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1.0 m

1.5 cm

2.0 m

2.5 m

Generally, electrical resistivity of intrinsic semiconductors decreases with increasing.

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Pressure

Volume

Temperature

Density

The terminal velocity in case of spherical droplet is directly proportional to.

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Square of the radius of the droplet

Radius of the droplet

Cube of the radius of the droplet

Half of the Radius of the droplet half

When a monochromatic wave enters from one medium into another the property that remains unchanged.

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Amplitude

Velocity

Frequency

Nature of the wave

The first super conductor was discovered in.

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1905

1911

1917

1923

Cosmic rays mostly comprise of

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Neutral particles

Negative charged particles

Positively charged particles

Ions

The SI unit of current gain is.

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Ampere

Ampere metre

Ampere volt

It has no unit

They hysteresis losses are eliminated in power transformer by using

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Low resistivity power winding

Low reflectance steel cores

Laminated steel cores

soft iron cores

X -rays are similar in nature to.

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Alpha particles

Beta particles

Gama rays

Photons

The ideal thermal efficiency of a cyclic heat engine is limited by

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Friction in the engine

Amount of heat in the engine

Difference between input temperature and output temperature.

Amount of work

The SI unit of angular velocity is.

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cm s-1

rad s-2

cm s-2

rad s-1

A pulse on the string is inverted when it is reflected from

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Free end

Fixed end

Either of the two

Rubber cord

For which of the following objects is the centre of mass equidistant from every point on its surface

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An unsharpened pencil

A gramophone record

An egg

A table tennis ball

What is used in an electric circuit to allow current in one direction only.

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A fuse

An ammeter

A diode

A relay

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