Question # 1

Fluids can transmit:

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Transverse wave

Compressional wave

Both of them

None of them

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

At high speed, fluid friction _____ and fuel consumption ___,:

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Increases, decreases

Increases, increases

Decreases, increases

None of these

In vibrational motion(SHM)

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P.E remains conserved

Average K.E remain constant

Neither P.E nor K.E remains constant

Total energy remains constant

Light year is a unit of:

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Time

Distance

Velocity

Intensity of light

The flux through a closed surface depends upon:

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Shape of geometry of the closed surface

Charge enclosed

Nature of the medium

Both (A) and (B)

Both (B) and (C)

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

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thermoionic electrons

free electrons

photoelectrons

slow electrons

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

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Is smaller than

Is greater than

Becomes equal to

None of these

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

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-2 mv

Zero

2 mv

mv

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

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Energy only

Momentum only

Mass only

Charge only

Both (A) and (B)

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

When the object lies between F and 2F, the image formed by is formed at:

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Real

Virtual

Diminished

Erect

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

1 amu is equal to.

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-24kg

1.66 x 10^-27kg

A voltmeter is used to measure the

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potential difference

current

temperature

resistance

In a transistor, if the central region is n-type, then this type of transistor is known as

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n-p-n transistor

p-n-p transistor

either of these

none of these

A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of:

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0.5 m/sec2

5 m/sec2

1.5 m/sec2

9.8 m/sec2

The Einstein's changes in length, mass and time are not observed in common life because

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We dont observer then seriously

The masses are too large

Their speed is too small than the speed of right

All of the above

A potential barrier of 0.7 V exists across p-n junction made from:

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Germanium

Silicon

Arsenic

Gallium

Indium

The density of blood is nearly equal to that of

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mercury

sodium

water

honey

Generally a temperature scale is established by using certain physical properties of a material which varies

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nonlinearly with temperature

linearly with temperature

either of them

none of them

1 amu is equal to

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-34kg

1.66 x 10^-27kg

The angle which specifies the instantaneous value of the alternating voltage or current is called

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phase

critical angle

angle of incidence

all of these

Density is defined as:

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Mass per volume

Volume per mass

Mass X volume

Mass per length

A conducting wire is drawn to double its length. Final resistivity of the material will be

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Double of the original one

Half of the original one

One fourth of the original one

Same as original one

Which one is not produced by sound waves in air?

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Polarization

Diffraction

Refraction

Reflection

The absolute temperature of the tripple point of water is

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100°C

4°C

373 K

273.16 K

The transition from solid state to liquid state is:

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Abrupt

Slow

Continous

Discontinous

Both (A) and (D)

Within each domain, the magnetic field of all the spinning electrons are

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parallel

antiparallel

perpendicular

all of them

The basic circuit element in A.C. circuits are:

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Resistor and capacitor

Resistor and Inductor

Capacitor only

Both (B) and (C)

None of these

The instantaneous acceleration of a body moving with constant speed in a circle:

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Remains constant

Is called centripetal acceleration

Tangential acceleration

None of these

The electrons in the outermost shell of an atom are called

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core electrons

valence electrons

high energy electrons

none of them

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