Question # 1

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

The quantity having dimension of ML²T⁰²will earth is:

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80 sec

500 sec

1.802 X 10⁴sec

Aerophysics

Which of the following pairs does not have identical dimensions?

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Torque and energy

Energy and work

Momentum and impulse

Mass and moment of inertia

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

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parallel

antiparallel

perpendicular

all of them

Which one of the following is dimensionless:

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Acceleration

Velocity

Density

Angle

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

The work done in moving a body between two points in a conservation field is independent of the:

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Direction

Force applied

Path followed by the body

Power

S.I. unit of planks constant is

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J-s^-1

J.s

J.s^-2

J.s²

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

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21 x 10³+ 10%

23 x 10¹+ 10%

21 x 10³+ 5%

12 x 10³+ 5%

The magnifier forms a virtual image of the object at:

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Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

Huygen's principles states that:

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Light travels in straigth line

Light has dual nature

Either of these

None of these

The domains are of macroscopic size of the order of

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centimeters

meters

millimeters

nanomneters

Tick the correct answer:

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Torque is a vector quantity

Torque is the turning effect of a force

Torque is called moment of a force

All of above

When a nucleus emits an alpha particles, its charge number decreases by

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3

2

6

5

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

One coulomb per second is equal to

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One volt

One ampere

One hom

One henry

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

The induced emf in a coil is proportional to:

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Magnetic flux through a coil

Rate of change of magnetic flux through the coil

Area of the coil

Product of magnetic flux and area of the coil

From sand, we get a material used for construction with the motion of bodies under the action of forces is called:

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Optics

Mechanics

Thermodynamics

Astrophysics

The liquid which conduct current is known as

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heating effect

chemical energy

electrolyte

ohm's law

The motion of a body in a straight line is the motion in

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one dimension

two dimension

three dimension

four dimension

Polymers are the chemical combination of carbon with:

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Nitrogen

Oxygen

Hydrogen

All of these

None of these

In a charged capacitor the energy is stored in

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Both in positive and negative charges

Positive charges

The edges of the capacitor plates

The electric field between the plates

If there identical strings each of constant K are hooked together the spring constant of resultant spring will be:

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3 K

2 K

K/4

K/3

Direction of motion ______ in circular motion:

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Changes off and on

Changes continuously

Does not change

None of them

The consumption of energy by a 1000 watt heter in half an hour is:

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5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

The least distance of distinct vision is:

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10 cm

25 cm

50 cm

100 cm

The reverse saturation current in a PN junction diode is only due to

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Majority carriers

Minority Carriers

Acceptor ions

Donor ions

In case of mechanical waves, we study the motion of

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a single particle

collection of particle

any one of them

none of them

Amplitude is the displacement of the vibrating body from:

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One extreme position to the other extreme position

Mean position any one extreme position

Both A and B are correct

None of these

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

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100 ev

10⁶e v

10³e v

1.0 e v

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