Question # 1

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

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A greater than than of B

A is equal to that of B

A is less than that of B

A is twice the pressure of B

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

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outwards

inwards

in either way

none of these

Velocity of sound in vacuum (in m/s) is

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330

1000

156

0

The area under line velocity-time graph is numerically equal to the

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speed of the body

acceleration of the body

distance covered by the body

none of them

Laser is a beam of:

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Visible light

Infra red light

Ultra violet light

Violet light only

yellow light only

The photon of radio-waves has energy of about

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1 Me V

1 Ke v

10^-10e v

10¹⁰e v

Triple point of water is

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273.16°F

372.16K

273.16°F

273.16

Waves transport energy

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without transport energy

with matter

both of them

none of them

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

Most of the electrons in the base of an NPN transistor flow

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Out of the base lead

Into the collector

Into the emit

Into the base supply

The force between two charges in 8 N. Now placed a mica of relativity 4 between two charges as a medium, the force then reduced to

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2 N

4 N

6 N

8 N

_____________ suggested the basic formula of fractional force F is liquid

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Maxwell

Newton

Plank

Stoke

The SI unit of torque is

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Nm^-1

Nm^-2

Ncm

Nm

Electron volt is a unit of

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Potential difference

Energy

Charge

Power

Is it possible to add a vector quantity to a scalar quantity ?

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No

Yes

Never

None of these

Einsteins theory donot tell the force of gravity acting on bodies instead, bodies and light maces along geodesies in

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Space time

Straight space time

Curved space time

All of these

Hard magnetic materials are

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Iron

Steel

Alnico

None of these

The typical speed of Moon around the Earth is

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1000 ms^-1

2000 ms^-1

3000 ms^-1

4000 ms^-1

Velocity of a body changes if

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direction of motion the body changes

speed of the body changes

neither speed nor direction changes

either speed or direction changes

Which will be more effective in knocking a bear down

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A rubber bullet

Lead bullet of same momentum

A wood bullet

None of these

The direction of torque is

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Along F

Along r

Perpendicular plant formed by F and r

None of these

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