Question # 1

The direction of velocity is along the direction of

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distance

displacement

acceleration

all of them

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

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Decreases

Increases

Remains same

Zero

For a fixed force, larger is the mass of a body the

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greater is its acceleration

smaller is its acceleration

smaller is its weight

zero is its acceleration

An inertial frame of reference is that frame of reference in which

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a = 0

a > 0

a < 0

all of them

Under the elastic region, the deformation produced in the material, the deformation produced in the material will be

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permanent

temporary

either of them

none of them

The cause of mirage observed in deserts in bright sunlight is due to

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Refraction of light

Reflection of light

Scattering of light

Total internal reflection of light

Examples of moderators used in a fission reactor is/are:

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Water

Heavy water

Carbon

Hydrocarbon

All of these

An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be

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1 MeV

2 MeV

4 MeV

8 MeV

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

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90°

75°

0°

180°

The earliest heat engine was

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petrol engine

diesel engine

electric engine

steam engine

In frequency modulation (FM), the carrier waves amplitude

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Remains constant

Increase

Decreases

None of these

In relation Vt = 2gr²ρ/9η. Terminal velocity is directly proportional to

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r

r²

r³

None of these

If the velocity of a body changes by equal amount in equal intervals of time, the body is said to have

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acceleration

uniform acceleration

instantaneous acceleration

uniform velocity

When a crystal is subjected to stress, it tends to break or fracture along definite direction which is characteristic of a simple. This is called

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Cleavage

Allotropy

Isotropy

None of these

Wave length of red colour as compared to that of violet colour is:

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Smaller

Longer

Equal

None of these

The example of nuclear fusion is:

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Formation of barium and krypton from uranium

Formation of plutonium -235 from uranium -235

Formation of helium from hydrogen

Formation of water from hydrogen and oxygen

A body falling freely under the action of gravity has

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Constant weight

Variable weigth

Maximum weigth

No weigth

Uniform electric field can be mapped with electric field lines which are

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Parallel

Equally spaced

Parallel and equally spaced

None

If the mass of earth becomes four times to its initial value than the value of g will be

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Does not change

Becomes four time

Become one fourth of its initial value

None of these

When the shear stress and shear strain are involved, then their ratio is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

Even the small viscosity of the air causes a retarding force on car at high speed is

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Small

Large

Very large

None of these

In order to observe interference , the interfering beams must be

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monochromatic

coherent

either of them

both of them

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