Question # 1

What is the refractive power of cornea in humans.

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13 dioptres

23 diaoptres

33 dioptres

43 dioptres

The vertical component of earth's magnetics field is zero.

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At magnetic poles

At geographical poles

At magnetic equator

Everywhere

What is the part of a simply D.C. motor that reverses the direction of current through the coil every half cycle.

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Armature

Brushes

Commutator

Slip rings

use of outer layer in optical fires called cladding is mainly to.

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Scatter thelight

Absorb unwanted light

Transmit the light

Produce total internal reflection

The basic circuit element is a D.C. circuit is

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An inductor

A resistor

A capacitor

A battery

Which type of oscillations produce resoncance.

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Free

Forced

Damped

All of these

Which of the following solids exhibits only short range order.

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Amorphous solids

Polymeric solids

Crystalline solids

All of the above

The part of theory of relativity which deals with accelerated bodies is called.

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special theory of relativity

General theory of relativity

Lorentz's theory of relativity

Galilean theory of relativity

The internal inertia of a thermodynamics system is known as.

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Enthalpy

Entropy

Isotherm

Adiabatic

The velocity of sound will be greater in.

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Air

Water

Solids

Vacuum

The expression PV/KT represents.

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Number of moles of the gas

Number of molecules in the gas

Total mass of the gas

Density of the gas

An electric current in conductors is due to the flow of.

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Positive ion

Negative ion

Positive charges

Free electrons

When a helium atom loses an electron it becomes.

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An a particle

A proton

A positive helium ion

A negative helium ion

The ratio of specific heat capacity to motor heat capacity of a body

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Is a universals cantante

Depends upon the mass of the body

Depends upon the molecular weight of the body

Is dimensionless

For the normal operation of transistor the emitter base junction is always.

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Zero biased

Reverse biased

Forward bised

Both a and b

The ablate of rays of different colours to converge a single point sifter refraction though a convex lens is called.

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Come

Distortion

Spherical aberration

Chromatic aberration

The energy in an electromagnetic wave is carried in the units called.

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Protons

Electrons

Neutrons

Nucleus

To get large magnifying power of an astronomical telescope. we should have focal length of eye lens.

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Small

Large

Of any value

Infinity

Density of blood a

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Equal to water

Greater than water

Less than water

zero

When a transverse wave is reflected on going from a more dense to a less dense medium.

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There is no phase shift

There is a 180 ^o phase shift

There is a phase shift of 360 ^o

A crest is transformed to a trough

The ripple tank is used to study various features of

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Wave phenomenon

Interferences

Doppler's effect

Reverberation

Intensity of the dark bands in interference pattern becomes zero when two waves.

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Of light are monochromatic

Are of the same frequency

Are of the same amplitude

Travel in opposite direction

When a perfect gas is supposed to expand freely in an isolated vessel the gas has undergone.

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An increase in pressure

An increase in temperature

A change in phase

A change in entropy

Which six particles and their antiparticles interact by the weak interaction.

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Leptons

Hadrons

Muons

pi mesons

Who developed the world's first vacuum pump in 1650.

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Otto vori Guricke

Lord Kelvin

Saadi Carnot

James maxwell

A torch bulb uses a 3 V supply and makes a current of 0.2 A It is switched on for one minute How much electrical energy is used.

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0.6 J

12 J

24 J

36 J

Induced fission result from the absorption of

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electron

Proton

Nucleon

Neutron

In any collision between two bodies there need nor the conservation of

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Linear momentum

Angular momentum

Total energy

Kinetic energy

Angular moment is conserved due to

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Variable force

Constant force

Central force

Uniform force

The relation between horse power and watt is.

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1 hp = 546 watts

1 hp = 746 watts

1 hp = 946 watts

1 hp = 1000 watts

Which equation in electromagnetism describe the magnetic field B generated by an electric current.

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ampere's circuital law

Bio savart law

Gauss's law for electromagnetism

Coulomb's law

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