Question # 1

The best instrument used for the measurement of emf of a cell a

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A voltimeter

An ammeter

A potentiometer

Wheatstone bridge

The working of cloud chamber is based in the presence of.

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Super heated vapours

Liquid

Super saturated vapors

Unsaturated vapours

How solid hydrogen is obtained.

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By cascade process

By joule kelvin effect

By adiabatic expansion

Lowering temperature below melting point

What is a measure of the separation of positive and negative electrical charges in a system of charges.

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charge polarization

Electric dipole moment

Electric field

Electrostatic induction

A heat engine with 100% efficiency would have to

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Do no work

Be at a uniform temperature

Use no heat

Discharge at 0^oC

When the deforming force applied on a body produces change in volume then it is said to be

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Tensile stress

Compression stress

Shear stress

Shear modulus

Which of the following is not an elastic collision

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A man jumps on a cart

A bullet embedded in a block

Colliding of two glass balls

Colliding of two tennis balls

An alternating current can be produced by

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Turbine

Electric motor

Generator

Trnasormer

One rem is equal to.

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0.1 Sv

0.01 Sv

0.001 Sv

0.0001 SV

Simple harmonic motion may be assumed as a projectio of uniform circular motion along a

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Diagonal

hypotenuse

Diameter

Radius

When the temperature of a body is equal to that of the surrounding then the body appears

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Dull black

Red hot

In thermal equilibrium

To be cold

Lenz's was a physicist of.

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America

Russia

Japan

China

Which statement about convection is correct.

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Brownian motion is a form of convection

Convection occurs only in gas

Convection results from a density change

Evaporation is a form of convection

Current gain of a CE amplifier is 50, ITS hfe is about

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25

50

75

100

How does heat transfer between objects.

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From cold to hot objects

From hot to cold objects

By electromagnetic radiations

From hotter to hottest objects.

Which law states that an induced current is always in such a direction as to oppose the motion or change causing it.

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Ampere's law

Gauss's law

Lenz's law

Kirchoff's law

Which statement for geostationary orbit is false.

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A geostationary orbit must be directly above the equator

All satellites in a geostationary orbit must have the same mass

The period of a geostationary orbit must be 24 hours

There is only one possible radius for geostationary orbit

Which law states that the angle of incidence equals the angle of refraction.

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Law of reflection

Law of refraction

Snell's law

Hygens's principle

The SI unit of radioactivity is.

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Becquerl

Curie

Joule

rutherford

Which given quantity remains the same in isotones.

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Mass number

Atomic number

Number of neutrons

Number of protons

Binding energy per nucleon is.

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Greatest for heavy nuclei

Least for heavy nuclei

Greatest for light nuclei

Greatest for medium weight nuclei

The working principal of a photograph enlarger is basically the same as that of a.

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Camera

Side projection

Microsopce

Telecopse

What would be the magnitude and direction of acceleration which would made the spring balance reading zero.

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Zero

1 m s-2 upward

9.8 m s-2 upward

9.8 m s-2 downward

The centre of gravity of a body is

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The centre of the body

The point at the mass of the body acts

The point at which the whole weight of the body acts

The point of rotation

Two convex lenses of equal focal length 'f' are placed in contact, the resultant focal length is

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Zero

1

2f

f/2

The phenomenon in which a charging current in one coil induces an emf in another coil is called.

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Induced current

Induced emf

Self induction

Mutual induction

The extension produced in a sample of material depends upon

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Nature of the material

Stretching force

Cross range order

All of the above

LASER is a device which can produce.

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Monochromatic beam of light

Coherent beam of light

An intense beam of light

All of the above

The branch of medicine which deals with the anatomy physiology and diseases of the eye

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Ophthalmology

Radiology

Cardiology

Andrology

Slip Rings are used in

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D.C. dynamo

A.C. dynamo

Transformers

Battries

Among different elements of the periodic table which of the following atoms is the simplest.

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Carbon

Oxygen

Hydrogen

Nitrogen

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