Question # 1

Which are the following describe the study of static magnetic fields.

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Electrodynamics

Megnetostatic

Electrostatic

Paraamagnetism

Which of the following quantities is discrete according to Bohr's hypothesis.

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Momentum

Potential energy

Angular velocity

Angular momentum

Pressure of a gas depends upon

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Only on the molecular speed

Only on the speed of molecules on a unit volume

Only on the mass of molecules

Number of molecules mass and speed in a unit volume

If each particle of the fluid passing through a point follows the same path then flow is said to be

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Regular flow

Irregualr flow

Turbulent flow

Streamline flow

The phenomenon in which a photon of frequency 'f' is scattered by an electron and the scattered photon has frequency f <f is known as.

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Pair production

Pair annihilations

Photoelectric effect

Compton's effect

Reciprocal of the focal length is called.

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Radios of curvature of the lens

Power of the lens

Aperture of the lens

Resolving power

Electromagnetic wave theory was proposed by

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Maxwell

Hertz

Fizeace

Huygen

If a person winds a coil of wire around a steel rod and then passes an electric current through the wire then the

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Steel rod becomes an electromagnet

Steel rod becomes hot

Wire becomes magnetized

wire becomes demagnetized

How does viscosity affect relative motion between the liquid layers.

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Does not affect

Accelerates

May accelerate of retard

Retards

For which process is the relation Delta Q = Delta V true.

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Isothermal

Adiabatic

isobaric

Isochoric

Which of the following can be used visualize the third law thermodynamics

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Light

Heat

Water

All of these

Which one fo the following is based on the diffraction and repulsion of electric charge.

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Capacitor motor

Transformer

Induction motor

synchronous motor

The force exerted by two charged bodies on another obeys Coulomb's law provided that

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Both bodies are in the same medium

the charges are not too great

On body does not lie inside the other

The linear dimensions of the body are very much less than the distance between the bodies.

Which of the following radiations will burn human skin

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Infrared

Ultraviolet

X rays

Alpha particles

Any transparent medium bounded by one or two spherical surfaces is called

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Prism

Lens

Plane mirror

Grating

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

Which method of charging is involved in making lightning.

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Induction

Friction

Contact

Convection

Though the wavelength of X-rays is smaller than that of visible light yet the speed of X-rays in vacuum is.

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longer that that of visible light

Smaller than that of visible light

Same as that of visible light

Unpredictable

A 10 kg rocket fragment falling towards the earth has a net downward acceleration of 5 ms -2 The net downward force acting on the fragment is

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5 N

10 N

50 N

105 N

Who gave the idea of matter wave.

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De Broglie

Planck

Einstein

Huygen

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

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Remains unchanged

Decreases

Increases

Become zero

If temperature of the sink is decreased the efficiency of a Carnot engine

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Increases

Decreases

Remains constant

First increases and thend ecreases

Telecommunication by Optical fibers is done by

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Single mode step index fibre

Multimode step index fibre

Multimode graded index fibre

All of the above

An object moves 5.0 m north and then 3.0 m south . Find both the distance travelled and the magnitude of the displacement vector.

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2.0 m, 8.0 m

8.0 m, 2.0 m

8.0 m, 8.0 m

2.0 m, 2.0 m

Radius of the Bother's orbit is r the radius of second orbit will be.

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2 r

3 r

4 r

8 r

When a current of 2 A flows for 5 s through a lamp 120 W of power are used How much charge flows through the lamp.

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10 C

12 C

24 C

60 C

Velocity of sound in any medium deepness upon.

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Elasticity

Density

Volume

Mass

The bunding energy per nucleon for iron is.

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zero

Maximum

Negative

Minimum

The process due to which current flows only during alternate half cycle is known as.

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Filtration

saturation

Half wave rectification

Full wave rectification

What is generated when air moves an air foil.

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Thrust

Lift

Drag

Turbulence

A given mass of air occupies 12 m2 at normal atmospheric pressure if the pressure is increased to 4 times the original value without changing the temperature what volume will the air occupy.

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3 cm3

6 cm3

9 cm3

12 cm3

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