Question # 1

Ultrasonic sound waves

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Can be heard by a normal human ear

Can be heard with the help of hearing apparatus

Can be heard with the help of microphone

cannot be heard

If gravitational field is not uniform over the extended object or system of point masses the centre of mass and centreof gravity will

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Be antiparallel

Not coincide

Coincide

Be perpendicular

The relation between the voltage and current that flows in a resistor is.

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V = 1/R

R = vi

V = I2 R

I = V /R

The value of 'g' is affected by earth's

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Non spherical shape

Daily motion

Volume

Density

The doped semi conductor materials are called

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Pure semi conductors

Poor semi conductors

Super conductors

Extrinsic semiconductors

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

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Positive ion

Negative ion

Positive charges

Free electrons

The SI unit of density is.

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kg m2

kg m-2

kg m-3

kg m2 s-2

Work function is generally expressed in.

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Electron volt

Joules

Newtons

Gauss

It is sometimes necessary to protect electrical apparatus from magnetic field This can be done by surrounding the apparatus with a box made from.

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Aluminum

Iron

Steel

Rubber

The specific heat of liquid

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Decreases with temperature

Increases with temperature

Remains constant with change in temperature

Increases with pressure

Advantage of using gases as thermornetic substrates is taht

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Gases have a small coefficient of expansion

Expansion of gases is irregular

Gases can be obtained in pure form

Gases have a large coefficient of expansion.

Human's eye acts like a

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LASER

Mirror

Lens

Fibre optics

The minimum velocity needed to put a satellite into the orbit

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Terminal velocity

Escape velocity

Critical velocity

Linear velocity

As the mass number varies, which of the quantities does not change w.r.t nucleus.

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Mass

Volume

Binding energy

Density

LASER beam my be measure very large distance because it is.

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Inidirectional

coherent

Monochromatic

Not absorbed

The phenomenon of Compton's effect process that right has

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Wave nature

Particle nature

Dual nature

Corpuscular nature

Potential of earth's surface is.

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Negative

Positive

Zero

Infinite

Why a positively charged object is made neutral by someone touching it.

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Electrons flow from the object

Protons flow onto the object

Protons flow from the object

Protons flow onto the object

A charged capacitor has charge on its

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Outside surface

Inner surface

Surroundings

Mid point

Emitter follower amplifier is an example of.

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Current series feedback

Voltage series feedback

Current shunt feed back

Voltage shunt feedback

The change in the dimensions of a body produced by the action of the deformation force is known as.

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Strain

Stress

Tensile strain

Tensile stress

The temperature scale based upon triple point of water was given by

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Rumford

Carnot

Kelvin

Celsius

The spacing of electric field lines between two identical point charges of opposite signs

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Is not indication of the field direction

Is not dependent on the magnitude of the charges

Is an indication of the field strength

Is large when the charges are very large

Which kind of thermodynamic process is defined as with no heat transfer into or out of a system i.e. Q =0

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Isobaric process

Isochoric process

Isothermal process

Adiabatic process

In ideal gas equation PV = nRT , R is

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Universal gas constant

Avogadro's number

Plank's constant

Gravitational constant

The frequency of the fundamental mode of transverse vibration of a stretched wire 1,000 mm long is 256 Hz When the wire is shortened to 400 mm at the same tension

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640 Hz

680 Hz

720 Hz

780 Hz

Which of the following parameters is irrelevant for a fuse wire.

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Its radius

Current flowing through it.

Its specific resistance

Its length

Huygen's concept of secondary waves.

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Allow us to find the focal length of a thick lens

Is a geometrical method to find a wave front.

Is used to determine the velocity of light

Is used to explain polarization

What is the direction of the magnetic field lines inside a bar magnet.

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From north pole to south pole

From south pole to north pole

From side to side

There are no magnetic field lines

in the region where the field lines are parallel and equally spaced, the field is.

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Zero

Unirorm

Non uniform

Negative

The volume of a goas at constant pressure is directly proportional to the temperature as measured on the.

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Celsius scale

Kelvin scale

Fahrenheit scale

Baume scale

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