Question # 1

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

The components of a vector which are perpendicular to each other are called

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Horizontal components

Vertical components

Rectangular components

All of these

The SI unit of work is

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Newton

Joule

Mol

Calorie

If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be

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7 m

332 m

664 m

1 m

Close orbiting satellites orbit the earth at a height of about

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400 km

4000 km

400 m

400 cm

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

Unit of impulse is equivalent to that of.

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Force

Momentum

Acceleration

Velocity

The horizontal range of a projectile of 30^owith horizontal is same at an angle.

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40^o

45^o

90^o

60^o

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.

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10 rad s-1

7 rad s-1

3 rad s-1

2 rad s-1

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

A bat finding its correct location by sending

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Matter waves

Ultrasonic waves

Infrasonic waves

electromagnetic waves

the work done in isochoric process is.

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Constant

Variable

Zero

Depend upon condition

If the wave motion is 0.01 sec and wave speed is 100 ms-1 then frequency of wave is.

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0.5 Hz

1 Hz

10 Hz

100 Hz

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

The dot product of two vectors A and B will be zero, if angle between A and B is

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Zero

30^o

90^o

180^o

A diatomic gas molecules has

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Translational energy only

Rotational energy only

Vibrational energy only

All translational, Rotational and vibrational energy

If a body is moving in the counter clockwise direction the direction of angular velocity will be

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Toward the centre

Away from the centre

along the linear velocity

Perpendicular to both radius and linear velocity

A layer of rock holding water that allows water to percolate through it with pressure is called.

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Geyeser

Aquifer

Stem vent

Hot spring

The frictional effect between the different layers of fluid is called

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Terminal velocity

Stock's law

Viscosity

Surface tension

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