Question # 1

Any alternations product in shape length of volume where a body is subjected to some external force is called

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Deformation

Polymerization

Crystallization

Elasticity

A spring obeying Hooke's law has an upstretched length 50 mm and a spring constant of 400 N m-1 What is the tension in the spriing when its overall length is 70 mm.

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8 N

28 N

160 N

400 N

The velocity at which laminar flow changes to turbulent flow is called.

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Terminal velocity

Escape velocity

Critical velocity

Uniform velocity

Blood pressure of a person

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Increases with age

Describe with age

Have no change

Stops with age

Which liquid can flow easily.

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Traacle

Pitch

Ether

All flow with same rate

A piece of weighed wood just floats in water when placed in alcohol will

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Float lower

Float higher

Stay as before

Sink

The terminal velocity in case of spherical droplet is directly proportional to.

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Square of the radius of the droplet

Radius of the droplet

Cube of the radius of the droplet

Half of the Radius of the droplet half

The smooth and steady streamline flow is known as

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Turbulent flow

Laminar flow

Regular flow

Irregular flow

The SI unit of strain is

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N m-1

N m-2

N m

It has no unit

The buoyancy depends upon the

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Depth to which the body is immersed

Shape of the body

Mass of the body

Mass of the liquid displaced

Viscosity will be maximum when

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Water is at 20 ^oC

Honey is at 20 ^oC

Water is at 100 ^oC

Milk is at 100 ^oC

A solid object is

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Not elastic below the elastic limit

Not elastic above the elastic lime

Elastic below the elastic limit

Not elastic at all

Rate of flow of a liquid is expressed in

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Litre m-3

Litre s-1

Litre m-1

Litre s

The magnus effect is equivalent to

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Bernouli's theorem

Archimedes principle

Pascal's law

Blood pressure

A breaker is full of water with an ice piece floating The ice place has a lead piece in it When ice cube mells then.

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Water overflows

Level falls

Level remains unchanged

Density increases

Which force pushes up a body in fluid

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Thrust

Lift

buoyant

Pressure

Gases have

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Fixed shape

Fixed volume

Fixed shape and volume

No fixed shape and volume

A hydrometer floats to a particular level in sea water in fresh water it.

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Floats lower

Sinks completely

Floats higher

Floats at the same level

Soap cleans the dirty clothes because.

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Its chemical constituents are changed

Itr increases the surface tension of its solution with water

It increases the surface tension of its solution with water

It is less dense than that of water

In any fluid the effect of decrease in pressure with the increase in speed in a horizontal pipe is known as

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Bernoulli's effect

Venturi effect

Torriculli's effect

Shift effect

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