Question # 1

Torricelli's theorem is given by

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When a body is moving along a circular path, then such a motion is called

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Vibratory motion

Rotatory motion

Linear motion

None of these

A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.

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10 rad s-1

7 rad s-1

3 rad s-1

2 rad s-1

A ray of light shows the direction of propagation of light It is line which is.

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Normal to the wave front

Parallax to the wave front

Opposite to the wave front

Equal to the wave front

the wavelength of transverse wave travelling with a speed 'v' having frequency 'f' in equal to

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f/v

Vf

V/f

f/V2

Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

Temperature of a gas is increased from 27 oC to 127 oC. The ratio of its mean K.E. will be

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3/4

9/16

4/3

10/9

Dot product of vector with itself is.

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Zero

2 A

A²

A

the final image obtained by astronomical telescope is.

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Erect

Virtual

Magnified

All of these

The focal length of a concave lens is always

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+ve

-ve

Zero

None of these

If heat engine absorb 400 J and rejects 200 J heat energy, its efficiency will be.

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25%

50%

70%

100%

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

The direction of null vector can be

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(+) ve

(-) ve

Arbitrary

Zero

The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

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372 ms-1

356 ms-1

346 ms-1

332 ms-1

The resultant of two forces 3 N and 4 N acting at right angle to each other is

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7 N

5 N

4 N

1 N

The magnifying power of an astronomical telescope is 10. If the focal length of objective is 100 cm, then what is the focal length of eye piece.

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10 cm

100 cm

1000 cm

5 cm

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

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