Question # 1

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

Light entering rom air glass does not change in its.

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Frequency

Wavelength

Velocity

Direction

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

The mass of an object is quantitative measure 0 its

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Momentum

Acceleration

Inertia

Energy

The kinetic energy of molecules of an ideal gas at absolute zero is

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Very low

Very high

Zero

First increases then decreases

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

When water falls from tap, its cross sectional area decrease due to.

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Decrease of speed

Increase of speed

Air pressure

Gravity increase

Hygen's principle is used for.

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Explain polarization

Locate the wave front

Find the speed of light

Find the index of refraction

In blue light is used as compare to red light then fringe spacing.

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Increase

Decreases

Remain same

Becomes zero

When body acquires terminal velocity them its acceleration 'a' becomes.

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a = 0

a = g

a > 0

a < 0

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

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0.5

5

10

20

The speed of stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

The resultant of two vectors having magnitude 10 N and 8 N Can not be

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2 N

9 N

18 N

20 N

A layer of rock holding water that allows water to percolate through it with pressure is called.

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Geyeser

Aquifer

Stem vent

Hot spring

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

The least distance of distinct vision for the normal eye is.

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15 cm

25 cm

125 cm

25 m

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

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11th Class Part 1 Physics Test Online MCQs With Answers

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