Question # 1

Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is.

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2

258

516

4

At what speed the momentum and kinetic energy of a body having the same.

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1 ms-1

2 ms-1

4 ms-1

8 ms-1

Air blows from

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High pressure to low pressure

Low pressure to high pressure

Low temperature to high temperature

High temperature to low temperature

A layer over the central core of the jacke is called.

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Jacket

Plastic

Cladding

Rubber

The dimensional of potential energy per unit volume are same as that of.

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Work

Pressure

Speed

Density

The diameter of a lens is called

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Focal length

Aperture

Principle axis

Centre

The light signal in Opticla fiber must be regenerated by advice called.

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Regenerator

Generator

Repeater

Diode

First law of thermodynamics can be defined by the equation

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the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

The unit of solar light inversely is

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Watt

kW m-2

Watt m-2

1 m2

The SI unit for measuring plane angle is

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Streadian

Radian

Both a and B

None of these

As we go from pole to equator of earth, the value of 'g'

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Increase

Decrease

Remain constant

Zero

The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is

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2.45 watt

24.5 watt

245 watt

2.45 watt

The Idea that light is electromagnetic waves was indroduced by

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Maxwell Planck

Newton

Fermi

Crooks

During adiabatic process, which factor remains constant.

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Entropy

Pressure

Momentum

Power

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

Time period of simple pendulum only depends on

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Mass

Amplitude

Density

Length

A finite volume of gas consists of

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Small no. of molecules

Large no. of molecule

Average no. of molecule

None of these

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