Question # 1

Internal friction of fluid is called

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Surface tension

Viscosity

Resistance

Cohesive force

Two sources of sound are said to be coherent if

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The produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

The maximum distance of body from mean position when body is executing SHM is called

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Time period

Displacement

Amplitude

Frequency

Acceleration of the mass at any instant is given by

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a=k/m x

a= - m/k x

a = - k/m x

a=m/k x

(CRO) Cathode ray oscilloscope is a device used for high speed

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velocity

graph plotting

time-velocity

none of these

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

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Short wavelength

Large wavelength

Very large wavelenth

Low frequency

Both (B) and (C)

The property of light which does not change with the nature of the medium is:

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Frequency

Amplitude

Wavelength

None of these

To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined

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Parallel

Antiparallel

At angle 60°

Perpendicular to each other

The molecules or ions in a crystalline solids are

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static

not static

randomly moving

all of them

To sources are said to be coherent if they have:

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Same amplitude

Same wavelength

Definite phase relation with each other

None of them

The charge carriers in electrolyte are positive and negative

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protons

electrons

ions

none of these

If the mass of the simple pendulum becomes double, its time period

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increase

decreases

remains constant

none of them

Boyle's law is applicable in

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Isochoric process

Isothermal process

Isobaric process

Isotonic process

Fire fighters have a jet attached to the head of their water pipes in order to head of their water pipes in order to

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Increase the mass of water flowing per second

Avoid wastage of water

Increase the velocity of water flowing out

Increase the volume of water flowing per second

Lyman series in the spectrum of hydrogen exists in the :

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Infra-red region

Visible region

Ultraviolet region

Both(A) and (B)

None of these

Maximum work is done when force and displacement are

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Parallel

Antiparallel

Perpendicular

Both a and b

If the length of a simple pendulum is 0.25 m its time period would be

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1.0 s

2.0 s

3.0 s

4.0 s

The dimensions of viscosity are:

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M²L^-1T^-2

M^-1L¹T^-1

M^-1L^-1T

ML^-1T^-1

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

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0°

30°

60°

90°

The Phenomenon of generation of induced emf is called

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Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both A and B

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

Which one of the following wave motions is transverse:

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Wave motion produced in water when a piece of stone is thrown into it

Pulling of weight hanging vertically with a spiral spring

Both of these

None of these

The positron was discovered by:

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In cosmic radiation

In 1932

By Carl Anderson

All above

By direc

If the absolute uncertainty of an instrument is 0.0a1 cm, then its least count will be :

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0.005 cm

0.01 cm

0.02 cm

0.001 cm

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

Hotness and coldness of an object is represented in terms:

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Heat

Temperature

Chemical energy

None of these

When a wave is travels from one place to another, it transfers:

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Matter

Energy

Momentum

Both B and C

Blood is an

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Compressible fluid

incompressible fluid

hard

none of them

The electric field lines start from:

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Positive charge

Negative charge

Either A and B

Neutron

An atom

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

How much force is required to slide one layer of the liquid over the other layer is measured by

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friction

density

viscosity

resistivity

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