Question # 1

If the pressure of a gas is doubled, then speed of sound is.

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Doubled

Become half

Not affected

Increases by four times

the louder the sound, the greater will be its.

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Speed

Frequency

Amplitude

Wave length

Two waves of same frequency and moving in the same direction produces.

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Interference

Diffraction

Beats

Stationary waves

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

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 distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

Physical quantiaties are divided into

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Two Categories

Six categories

Three categories

None of these

The dimensional of potential energy per unit volume are same as that of.

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Work

Pressure

Speed

Density

An athlete runs with a speed of 12 ms-1. Determine the longest jump he can undertake.

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12 m

14.4 m

24 m

16.2 m

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

The SI unit of flow rate are

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m-sec^-2

m³-sec^-1

m³-sec^-2

m-sec^-3

A wheel of radius 50 cm having an angular speed of a rad /s have linear speed.

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1.5 m/s

3.5 m/s

2.5 m/s

4.5 m/s

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

Height of geo stationary orbit of the satellite above the earth is.

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300 km

250 km

400 km

None of these

The mechanism of transports energy of all the waves is

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Different

Same

Complicated

Easy

The to and fro motion of a body is called

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Linear motion

Rotational motion

Vibratory motion

None of these

Weight of a 60 kg man in moving elevator with constant acceleration of 1/2 f

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Zero

300 N

600 N

200 N

The relation between the speed and hoop can be written as

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2

4

1/2

1/4

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