Question # 1

The viscosity of an ideal fluid is

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Infinity

Unity

Zero

0.5

Which of the following pair of physical quantities have the same dimension.

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Momentum and pressure

Energy and work

Linear and angular momentum

Force and surface tenstion

A solid in which there is no regular arrangement of molecules.

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Amorphous solids

Glassy solids

Crystalline solids

Polymerization

Compton scattering experiment seemed to indicate that radiation had

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Wave nature

Particle nature

Wave particle nature

X-rays nature

Which type of microscope was the first to be developed.

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Optical microscope

Digital microscope

Electron microscope

All were developed at the same time

In an elastic collision

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K.E. is conserved

Both K.E. and momentum are conserved

K.E. is not conserved

Only momentum is conserved

Refraction contributes to the formation of.

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Rainbows only

Mirages only

Echo

Rainbows and mirages

The diameter of a lens is called.

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Focal length

Principal axis

Optical centre

Aperture

When of the following radiations are not emitted by electron transitions in atoms.

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Visible rays

Ultraviolet rays

Infrared radiations

Alpha particles

A spectroscope sorts out

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Atoms

Molecules

Elements

Isotopes

At the temperature of -273 ^oC. pressure of a gas at constant volume becomes zero This specific temperature is called.

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Freezing point

Critical temperature

Absolute zero

Terminal point

When a conductor situated in a dielectric is charted the energy resides.

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Only on the dielectric

Only on medium surrounding charge

On the dielectric and medium both

Only on the type of the charge

Electrostatic force as compared to gravitational force is

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Zero

infinite

Very weak

Very strong

When two identical travelling waves are superposed, velocity of the resultant wave

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Remains unchanged

Decreases

Increases

Become zero

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

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Charge

Potential

Capacitance

Inductance

A body in equilibrium may not have

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Velocity

Momentum

Acceleration

K.E

If the presence of air friction, the path of a projectile appears as.

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Straight line

Parabola

Hyperbola

zig zag

when a body accelerates.

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Its direction always changes

Its mass always changes

Its velocity always changes

It falls towards the earth

If a ball was thrown out of a rocket in free space, then it would.

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Accelerate away from the rocket

Remain motionless after leaving the rocket

Travel rectilinearly with constant speed

Move always parallel to the rocket

In a spectrometer experiment monochromatic light is incident normally on a diffraction gratin having 4.5 x 10⁵ lines per metre The second order line is seen at an angle of 30^o to The normal What is the wavelength of the light.

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430 nm

556 nm

589 nm

625 nm

A application of the phenomenon of polarization is in

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The scattering of light beams

Explaining the blue colour of sky

Identifying chemicals elements

Analysis of mechanical stress

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

The SI unit of current gain is.

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Ampere

Ampere metre

Ampere volt

It has no unit

The total energy of an electron in an orbit around the nucleus is.

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Zero

Unity

Infinity

Negative

What must be changing when a body is accelerating uniformly.

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Force acting on the body

Mass of the body

Speed of the body

Velocity of the body

Why choke coil is used in an AC circuit.

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To decrease D.C.

To increases A.C.

To decreases A.C

To increase D.C

Super conductor are used in

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Fast computer chips

Magnetic resonance imaging

Magnetic levitation trains

All of the above

The three law of motion first published in 1687 by Sir Issac Newton in his work.

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Method of Fluxions

Optics

Principal Mathematica

Arithmetic Universalism

Which method of charging is involved in making lightning.

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Induction

Friction

Contact

Convection

Newton proposed his corpuscular theory on the basis on

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Newton's rings

Polarization

Dispersion of white light

Rectilinear property of light

Which material has the larges resistivity.

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Silver

Germinium

Amber

Sulphur

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