Question # 1

Alpha particles are used for the treatment of skin of a patient due to.

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Highly ionizing power

Low penetration power

Positively charged particles

Helium nucler

The energy in electron volts necessary to remove the most loosely bound electron from the neutral atom is known as.

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Faraday energy

Wave number

Ionization Potential

Excitation potential

The SI unit of torque is

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kg ms-2

kg m2s-2

kg ms-1

kg m2 s-3

Difference between the molar heat capacity constant pressure and that a constant volume is equal to

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Root mean square velocity

Mean free path

Boltzmann's constant

Universal gas constant

The ability of eye to focus near as well as distant object is termed as.

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Myopia

Persistence of vision

Power of accommodation

Astigmatism

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

The main advantage of a grating over Young's apparatus is the

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Sharpness of the bright lines

Absence of dark fringes

Absence of bright fringes

Greater deviation of light

Which type of solid have definite melting point.

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Crystalline solids

Amorphous solids

Glassy solids

Polycrystalline solids

For which material magnetic susceptibility is negative.

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Paramagnetic

Diamagnetic

Ferromagnetic

All of these

Gas law PV = constant is for

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Adiabatic change

Isothermal changes

Isobaric changes

Isochoric changes

Which is the thick circular structure in teh eye containing an aperture with variable diameter It controls the amount of light reaching the retina.

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Retina

Iris

Pupil

Cornea

A bi prism consists of.

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Two parallel glass plates

Two acute angled prisms

Two obtuse angled prisms

Two right angled prisms

Which of the following is formed by decay of a free neurton.

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A number of electrons

Two protons

A proton and an electron

An alpha particle

Which of the following is invariant under Galilean transformation.

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Velocity

Impulse

Momentum

Distance

Two stem engine A and B have their sources at 900 K and 600 K and their sinks are at 450 K and 300 K respectively.

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They are equally efficient

A is less efficient than B

a is more efficient than B

Their efficiencies cannot be determined

The field inside a hollow spherical conductor is.

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Constantin zero

Constant but not necessarily zero

A function of charge on sphere

a function of distance from the centre

If velocity is doubled then

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Momentum increase 4 time and K.E. increase 2 times

Momentum increases 2 times and K.E. remains constant

Momentum increases 2 times and K.E. increases 4 times

Both momentum and K.E. remain constant

The force that moves a rocket or a plane forward is called.

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Lift

drag

Thrust

Turbulence

Who proposed the temperature equalization mechanism of a body by thermal radiations with that of its surroundings.

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Pierre Provost

Robert Brown

Albert Einstein

Issac Newton

If average acceleration is equal to instantaneous acceleration then the body's said to be moving.

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Negative acceleration

Positive acceleration

uniform acceleration

Variable acceleration

Direct current generators use.

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Coiled rings

Split rings

slip rings

solenoid rings

What is the effect of electric and magnetic fields on X-rays

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X-rays are deflected

X-rays are not deflected

X-rays are sometimes deflected and sometimes not

Nothing can be said

Which of the following radiations will burn human skin

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Infrared

Ultraviolet

X rays

Alpha particles

In the direction indicated by an electric field line.

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The electric field strength must increases

The electric field strength must decreases

The potential must remain constant

The potential must decreases

An electric lamp use energy at the rate of 46 W on a 12 V supply. How much charge passes through the lamp in 2s.

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0.15 C

0.50 C

2.0 C

8.0 C

The source of geothermal energy is

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The fusion in the sun

the radioactive decay in the earths interior

the rotation of earth around the sun

The rotation of earth around its own axis

Good acoustic implies

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Obtaining as much reverberations as possible

Making the reverberation as small as possible

Obtaining the optimum of reverberations

Eliminating reverberations

The Step up transformer

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Increase the input current

Increases the input voltage

Has more turns in the primary coil

Has less time in the secondary coil

The ripple tank is used to study various features of

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Wave phenomenon

Interferences

Doppler's effect

Reverberation

When using the formula E = h lambda what unit should energy have.

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Joule

Watt second

Newton metre

Electron volt

Linear magnification is equal to the ratio of.

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Size of the object to the size of the image

Size of the image to the size of the object

size of the object focal length

Size of the image focal length

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