Question # 1

The field in which work done is moving body between two points depends upon the path followed is called:

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Conservative filed

Non-conservative field

Electric field

None of these

In a metal, the valence electrons are:

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Attached to individual atoms

Not attached to individual atoms

Free to move within the metal

Both A and B

Both A and C

The resistance offered by a fluid to a solid moving inside it is called:

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Drag force

Surface force

Viscosity

None of these

The time required for a radioactive material to decrease in active by one half is called

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half time

half life

disintegration time

mean life

The magnitude of induced emf depends upon the:

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Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

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7.20 N

11.25 N

22.50 N

45.00

The work done by a force keeping an object in circular motion with constant speed is:

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Zero J.

0.1 J

1 J

0.01 J

The process which is carried out at constant temperature is known as

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adiabatic process

isothermal process

isochoric process

none of them

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

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Q/4πr²

2Q/4πr²

Q.d

Zero

A high concentration of red blood cells increases its viscosity from

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3 - 5 times that of mercury

5 - 8 times that of mercury

3 - 5 times that of water

5 - 8 times that of water

The half lie of radium-226 is

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238 years

4.5 x 10⁹days

1620 years

332 years

Which of the following lists of physical quantities consists only of vectors:

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Time,temperature,velocity

Force,volume,momentum

Velocity,acceleration,mass

Force,acceleration,velocity

Polymers are the chemical combination of carbon with:

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Nitrogen

Oxygen

Hydrogen

All of these

None of these

When 'θ' is small then

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tan θ ≈ sin θ

cos θ ≈ sin θ

sin θ ≈ tan θ

None of these

YDS experiment can be used to determine:

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Grating element

Fringe spacing

Wave length of monochromatic light

Frequency of wave light

The lift of Aero plane based on

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Law of gravitation

Bernoulli's theorem

Torricelli's theorem

Law of conservation of momentum

The conventional source of energy is

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Geothermal energy

Solar energy

Hydroelectric energy

None of these

The source in the heat engine is at

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Low temperature

High temperature

Zero temperature

None of these

S.I. unit of angular velocity of

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Radian per second

Revolution per minute

Degree per second

None of these

According to Bernoulli s theorem velocity and pressure

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Are directly proportional

Are inversely proportional

Have no relation

Are equal

The typical speed of human running is

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1 ms^-1

2 ms^-1

4 ms^-1

5 ms^-1

Avogadro number is known as number of molecules in:

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One kg of a substance

Unit volume of a substance

One mole of a substance

None of these

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