Question # 1

Power of lens is measured in

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cm

Metres

cm-1

Dioptres

Which uranium isotope having the atomic weights as given below is easily fissionable.

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234

235

236

238

Wave length of a LASER can be sued as a standard of.

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Angle

Time

Length

Temperature

In which of the following eddy current is not used

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Induction furnace

Automobile speedometer

Electromagnetic damping

X- rays diffraction

When an arrow is shot from a bow, it has K.E. which is given to it by

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The elongated tail

The stretched string of bow

The throw of archer

The sharp arrows head

Which term is used for the persistence of sound in a hall.

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Resonance

Acoustics

Symphony

Reverberation

For which material magnetic susceptibility is negative.

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Paramagnetic

Diamagnetic

Ferromagnetic

All of these

The central ring is bright in case of Newton's rigs produced by

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Reflection

Wedges

Refraction

Transmission

If a planet of mass double than that of the earth and radius three times greater than the earth a 10 kg mass on its surface will weight.

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2.2 N

4.4 N

6.7 N

13.2 N

A charge kept at the centre of a shell The shell has charge Q and radius R The force on the central charge due to shell is

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in the upward direction

Towards left

Towards right

Zero

When a force of 16 N acts on a mass of 4 kg for a time of 4 s. What is the rate of change of momentum.

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1 kg m s-2

4 kg m s-2

8 kg m s-2

16 kg m s-2

Which of the following quantities is analogous to mass in electricty.

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Charge

Potential

Capacitance

Inductance

Parallel rays of light are focused by a thin convex lens.A thin concave lens of the name focal length is then joinjed to the convex lens The focal point will.

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Shift to infinity

shift towards the lens by a small distance

shift away from he lens by a small distance

Remain at its original position

What is the change in path when sound wave is reflected from a rigid support.

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Lamda /2

Lamda

2 lamda

Zero

When light of particular frequency is allowed to fall upon a metal surface electrons are emitted from a these emitted electrons are called.

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Photons

Holes

Quants

Photo electrons

A current carrying loop lying-in a magnetic field behaves lime a.

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Magnetics pole

Magnetic material

Magnetic dipole

Horse shoe magnet

Which of the following is an electrostatic generator.

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Winshurst machines

Van de Graff generator

Electrophorus

All of the above

On average there is no energy transfer in.

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Sound waves

Water waves

Standing waves

Mechanical waves

Which one of the following has the largest wavelength.

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x rays

Infrared rays

Visible light

Radio waves

Mean free path of gas molecules is inversely proportional to its

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Volume

Pressure

Temperature

Size

Any frequency higher than the fundamental frequency of a sound is known as.

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Overtone

Beat

Acoustics

Shockwaves

When a positive charge is allowed to move from positive to negative plate, then it will gain

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P.E.

K.E

Gravitational energy

Electrical P.E.

A convention current is the movement of fluid caused by the change in.

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Pressure

Temperature

Densities

Volume

The erecting lens of a telescope produces

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A shorter instrument

wider field of view

A larger image

A sharp image

The critical mass of a fissionable material is.

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1 kg

10 kg

100 kg

1.,000 kg

In the equation P = IV cos Theta Cos theta is known as

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Phase angle

Liming angle

Phase

Power factor

The phase velocity is the velocity of a point that moves with a wave at constant phase it is also called.

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Phase speed

Wave speed

Wave velocity

All of these

What happens to internal energy of a piece of lead when hammered.

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Increases

Decreases

Remains unchanged

Becomes zero

Plossi or symmetrical eye piece consists of

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Two plano convex lenses with same focal length

Two sets of doublets

An achromatic double

A spherical doublet

Fluid mechanics is the study of how fluid move and the other ting involved is

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Energy

Velocity

Forces

Position

Electromagnetic waves are produced by

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Charge at rest

Accelerated changes

Heating a conductor

Electroplating

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