Question # 1

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

A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is

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125 J

90 J

160 J

85 J

The dimensions of viscosity are:

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M²L^-1T^-2

M^-1L¹T^-1

M^-1L^-1T

ML^-1T^-1

when the deformation produced in the material become permanent, this type of behaviour is called

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proportionality

elasticity

plasticity

none of them

The portion of the water above its mean level forms a:

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Crest

Trough

Both A and B

None of these

Which one of the following elasticizes is possessed by fluids:

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Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

The electric flux is linked with a surface will be maximum when

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The surface is held parallel to the electric field

The surface is held perpendicular to the electric field

The surface makes an angle of 45° with the electric field

All of the above

One kilogram of different substances contain

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same number of molecules

different number of molecules

may be same or different

none of them

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

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IT = 10^-4G

IT = 10⁵G

IT = 10³G

IT = 10⁴G

The pressure will change in the pipe, as the fluid moves through that pipe of varying

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cross-section

height

none of them

both of them

When a vector is multiplied by a negative number, its direction:

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Remains the same

Changes

Changes by 180°

None of these

Two equal, antiparallel and non-collinear forces are called

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Net force

Couple

Torque

None of these

Which of the following is the most common method to obtain polarized light?

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selective absorption

reflection from different surfaces

refraction through crystals

scattering by small particles

The magnitude of displacement is

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Distance between two points

Distance in a curved path

Shortest distance between two points

None of these

Deceleration means the speed of the body is

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Increasing

Decreasing

Just moving

None of these

The distance between the two mirrors can be varied by

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Moving glass plate

Movable mirror

Compensator plate

None of these

The geo-stationary orbit, in which, the satellite remains

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In motion

Fixed

Synchronized with Earth

None of these

Change in length divided by original length is called:

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tress

Young's modulus

Strain

Both (B) or (C)

None of these

Which one light source can travel faster through optical fibre is

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Infra red

Visible

Ultra violet

All of these

Every crystalline solid has a melting point

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Definite

Not definite

Any

Change every time

The time rate of change of displacement is called

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Speed

Velocity

Acceleration

None of these

In case of destructive interference of two waves, the amplitude of the resultant wave will be ______ either of the waves

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Greater then

Smaller then

Equal to

None of these

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