Question # 1

If the stress increased beyond the elastic limit of the material. the deformation produced in the material will be

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permanent

temporary

either of them

none of them

The density of water is 10³kg/m³. The water pressure on a submarine is 2.0 x 10⁷N/m². The depth of the submarine below the surface of the water, in maters, is approximately

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200 m

11000 m

2000 m

8000 m

A ball falls on the surface from 10 m height and rebounds to 2.5 m. if the duration of contact with the floor is 0.01 seconds then the average acceleration during contact is

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2100 m/s²

1400 m/s²

700 m/s²

400 m/s²

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

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Newton's second law

Pascal's law

Carnot theorem

Second law of thermodynamics

A rheostat can e used:

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As variable resistor

As potential divider

For varying the current

All of these

None of these

Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.

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Greater than

smaller than

Equal to

None of these

An important part of photocopier is:

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Toner cartridge

Deflection plates

Charging electrode

Print head

None of these

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

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980 N

580 N

1380 N

Zero

Which of the following does not obey ohm's law?

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Copper

Al

Diode

None

In describing functions of digital systems, a closed switch will be shown as

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0

1

low

any one of these

Compton shift refers to:

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Photon

Meson

Proton

Positron

Both (B) and (D)

Which of the following is not an example of intertial frame

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a body placed on the surface of earth

a body placed in a car moving with uniform velocity

a body placed in a car moving with same acceleration

none of these

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

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deuteron

deterium

protium

tritium

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

Bernoulli's equation is applicable for

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turbulent flow

streamline flow

both (a) and (b)

all kinds of flows

The alternative voltage of current is actually measured by:

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Its RMS value

Square root of its mean square value

Instantaneous value

Peak value

Both (A) and (B)

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

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magnetic flux

magnetic induction

magnetic field

self inductance

Astrophysics is a branch of physics, which deals with:

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Sub-atomic particles

Stars and galaxies

Light and sound

Music

One joule is equal to

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1.6 x 10¹⁹eV

6.25 x 10¹⁸eV

1.6 x 18¹⁸eV

6.25 x 10¹⁹eV

When a wall is pushed by a person very strongly, he has done:

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Maximum work

Zero work

Positive work

Negative work

Slope of velocity-time graph represents:

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Acceleration

Speed

Torque

Work

A mass difference of 0.0012 u is equivalent to and energy of:

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0.5 Me V

1.13 MeV

5.13 MeV

1.13 keV

1.13 eV

In equation F=ma, then mass 'm' is

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rest mass

variable mass

inertial mass

gravitational mass

A typical four stroke petrol engine undergoes how many successive processes in each cycle

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one

two

three

four

During the steady flow, different streamlines

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cannot across each other

can across each other

either of them

neither of them

Fog droplets are suspended in air when their weight is balanced by:

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Force of gravity

Upward trust due to air

Surface tension

None of these

A succession of events which bring the system back to its initial condition is called

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reversible process

irreversible process

a cycle

none of them

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)

A ball is dropped from a certain height and another ball is projected horizontally from the same point. Which of the following statement is correct?

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Both hit the ground at the same veloctiy

Both hit the ground at the same speed

The change of velocity during the path for both balls is the same

The change of speed during the path for both balls is the same

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