Question # 1

Second pendulum has a time period

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1 sec

3 sec

2 sec

4 sec

This is used for

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Co-efficient of friction

Co-efficient of expansion

Co-efficient of viscosity

Co-efficient of contraction

Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is.

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2

258

516

4

In S.H.M, the acceleration of the body is directly proportional to

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Weight of body

Applied force

Amplitude

Displacement

In simple harmonic motion the velocity of a particle is maximum at.

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Extreme position

Mean position

In between extreme and mean position

None of them

The experimental value for the velocity of sound in air is

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233 m-sec^-1

333 m-sec^-1

433 m-sec^-1

533 m-sec^-1

the acceleration of a body having SHM, depends upon its.

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Time period

Amplitude

Frequency

Displacement from mean position

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

The efficiency of diesel engine is about

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25 % to 30%

35% to 40%

40% to 50%

50% to 60%

If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.

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200 m

2 m

1 m

0.5 m

Bending of light around the edges of an obstacle is called.

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Refraction

Polarization

Interference

Diffraction

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 accepted value for speed of light in vacuum

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2.99 x 10⁸m - sec^-1

2.99 x 10⁶m - sec^-1

2.99 x 10⁸km - sec^-1

2.99 x 10⁸m - h^-1

What would encourage trade between two countries

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Different tax system

Frontier checks

National currencies

reduced tariffs

The diameter of a lens is called

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Focal length

Aperture

Principle axis

Centre

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

Unit of impulse is equivalent to that of.

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Force

Momentum

Acceleration

Velocity

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