Question # 1

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

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Double

Remains constant

Half

None of these

In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as

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plastic limit

plastic deformation

proportional limit

elastic behaviour

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

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decrease

remains the same

increase

any one of them

The field in which work done in moving a body between two points depends upon the path followed is called:

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Conservative field

Non-conservative field

Electric field

None of these

A non-inertial frame of reference is one, in which

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law of inertial is valid

all laws of physics are the same in all frames

a>0 or a<0

a=0

X-rays produced in a tube operating at 10⁵V. The speed of X-rays produced is

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3 x 10⁸m/s

3.1 x 10⁸m/s

2.8 x 10⁸m/s

1.88 x 10⁸m/s

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

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

Alfa particles are

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hydrogen nuclei

helium nuclei

electrons

photons

The direction of vector in space is specified by:

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One angle

Two angles

Three angles

None of these

The displacement coincides with the path of the motion when a body moves is a

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curved line

straight line

may be curved or straight

none of them

Two equal forces (P each) act at a point inclined to each other at an angle of 120°.The magnitude of their resultant is

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P/2

P/4

P

2P

For the monochromatic beam of X-rays, the crystal planes in a lattice act like a

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perfect absorbers

boundary

mirror

none of them

The total flux through a closed surface does not depend on

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Geometry of closed surface

Medium

Charge used temperature

None of these

Which of the following is the only vector quantity

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Temperature

Energy

Power

Momentum

Shear modulus for ice is

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1.2

2.5

3

3.3

The viscous force on a small sphere moving in fluid at high speed v is proportional to

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v²

v

1/v

1/v²

We can obtain biogas by rotting of biomass in a closed tank called

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Tanker

Container

Digester

Container

Salters duck is consists of

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Duck float

Body float

Balance float

a and c

The unit cell of the shape of match box is called

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Cubic

Tetragonal

Orthorhombic

Rhomboheral

In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19 C.The number of excess electrons on the drop is

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3.9

4

4.2

6

Time of flight of a body in projectile is the time in which a body

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Remains in the air

It reaches maximum height

The velocity becomes zero

None of these

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