Question # 1

The ratio of the velocities of wate in a pipe lying horizontally at two ends is 1 : 4 The ratio of diameters of pipe at these two ends is.

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1 : 2

2 : 1

1 : 4

4 : 1

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

The word Fluid means

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To rise

To fall

To flow

To oppose

When the projectile reaches the highest point of trajectory, the vertical component of velocity becomes.

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Small

Zero

Maximum

Vi cos

If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.

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30 m

15 m

1 m

28 m

The density of blood is nearly equal to.

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Air

Milk

Honey

Water

Which phenomenon of light proves that light waves are transverse in nature.

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Refraction

Reflection

Diffraction

Polarization

10 N and 20 N are acting on a body of mass 2 kg the minimum acceleration will be.

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10 ms-2

20 ms-2

60 ms-2

5 ms-2

A bat finding its correct location by sending

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Matter waves

Ultrasonic waves

Infrasonic waves

electromagnetic waves

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

The process followed by Newton for the determination of speed of sound in air is

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Adiabatic

Isothermal

Isobaric

Isochoric

A convex lens can be used as

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Simple microscope

Compound microscope

Telescope

Spectrometer

Pascal is the unit of

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Pressure

Force

Tension

Weight

Height of projectile is maximum at an angle of.

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45^o

60^o

30^o

90^o

Sound waves can not be

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Reflected

Refracted

Polarized

Diffracted

The dimensions of work are.

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[MLT-1]

[MLT-2]

[ML2T-2]

[MLT]

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

For working of heat engine, there must be

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A source

A sink

Ether of these

Both of them

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