Question # 1

Which magnetic properties is inherent in all materials.

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Para magnetism

diamagnetism

Ferromagnetism

demagnetism

A water wave is an example of

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Electromagnetic wave

Longitudinal wave

Transverse wave

Reverberation

The pitch of sound a determined by its

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Speed

Frequency

Direction

Number of beats

Because of second law of thermodynamics about the direction of energy flow what is possible.

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Heat

Light

Energy

life

If two different masses have same momentum then the lighter one has more.

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K.E. and velocity

Velocity only

Both K.E. and P.E.

Only P.E

Force acting on a test charge between the plates of a parallel plate capacitor is F. If one of the plates is removed teh force on the same test charge will be.

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Zero

F/2

F

2 F

Which of these is not a method of charging.

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Friction or rubbing

Induction

Contact or touching

Convection

A constant mass undergoes uniform acceleration the correct statement about the resultant force acting on the mass is.

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It increases uniformly w.r.t time

It is constant but not zero

It is proportional to the displacement from a fixed point

It is proportional to the verlocity

The phenomenon of Brownian motion shows that

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Molecules exist and can be seen as bright dots moving about

Molecules moves about randomly at highs speeds

Smoke particles behaves as molecules

Smoke particles can be used as models of air molecues.

A lens whose thickness is small as compared to focal length is a

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Concave lens

Double concave lens

Convex lens

Plano concave lens

Any substance that can flow is a

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Solid

Gas only

liquid only

Fluid

Which of the following forms of electromagnetic energy has the longest wavelength.

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Microwaves

Radio waves

Infrared waves

^{Visible light}

The bending of light when it enters a medium

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Reflection

Refraction

Diffraction

Total internal reflection

The emission of Beta particle from protonium -218 results in the formation of.

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Protactinium -231

Thorium -232

Astatine -218

Radon -222

The moment of linear momentum is called.

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Torque

Couple

Impulse

Angular momentum

A plane of polarization is one in which

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vibrations take place

No vibrations take place

Longitudinal vibrations take place

Transverse vibrations take place

Which of the following is mechanical property of a material.

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Strength

Stiffness

Ductility

All of these

Which current can pass through a capacitor continuously.

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Alternating current

Direct current

Eddy current

Pulsating current

A piece of weighed wood just floats in water when placed in alcohol will

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Float lower

Float higher

Stay as before

Sink

Which of the following devices can be used to produce both transvers and longitudinal waves.

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A string

A ripple tank

a helical spring

A turning fork

Which vector gives the displacement from one point another in space.

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Null vector

Position vector

Unit vector

Distance vector

Distance between two consecutive nodes or antinodes is equal to.

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Lamda /4

Lamda

Lamda /2

2 lamda

The current passing across a p-n junction due to minority charge carriers is called

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Reverse current

Forward current

Leakage current

Both a and b

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

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Electons

Protons

Neutrons

Photons

A spring obeying Hooke's law has an upstretched length 50 mm and a spring constant of 400 N m-1 What is the tension in the spriing when its overall length is 70 mm.

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8 N

28 N

160 N

400 N

The spin angular momentum and orbital angular momentum are usually differentiated in terms of.

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Radius of bodies

Mass of bodies

Torques of bodies

Momentum of bodes

A Fly is found to be sitting on a telescope when it is focused towards the moon What effect is expected on the photograph of the moon.

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Intensity remains unchanged

No effect

The complete field of view is blocked

Coloured image will be seen

Why does a transformer have a core made of iron.

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Iron has a high melting point

Iron is a magnetic material

Iron potential and high current

Iron is a conductor of electricity

Newton's first law of motion provides the definition of.

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Distance

Force

Vector

Acceleration

What are the dimensions of coefficient of velocity of

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[MLT-1]

[ML-1T-1]

[ML-2T-1]

[MLT-2]

The action and reaction forces

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Must act upon the same body

Must act upon different bodies

Must be equal in magnitude but need not have the same line of action.

Different speed at the different height during ascent and during descent.

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