Question # 1

The ratio of shearing stress/shearing strain is called as

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Modulus

Pascal modulus

Hooker's modulus

Shear modulus

In all natural processes where heat flows from one system to another, there is always a net

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decrease in entropy

increase in entropy

decrease or increase in entropy

none of them

Which of the following substances has got positive temperature coefficient of resistance?

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Carbon

Germanium

Silicon

Aluminium

None of these

Distance covered during one vibration of an oscillating body in terms of amplitude A is:

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A

2 A

3 A

4 A

A process in which no heat enters or leaves the system is called

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isochoric process

isothermal process

adiabatic process

none of them

The expression F x t is called impulse if the time 't' is

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zero

very large

very small

infinite

The bridge circuit of full wave rectification uses

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one diode

two diode

three diode

four diode

Heating effect caused by an electric circuit is written

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H = I²Rt

H = I²R

H = IR²t

H = IR²

The velocity of sound is greatest in

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Water

Air

Vacuum

Metal

With age, least distance of distinct vision:

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Increases

Decreases

Is not affected

None is correct

Silicon can be obtained from:

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Lead

Uranium

An isotope of oxygen

Sand

The appearance of colours in the shape (or oil) film results from:

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Dispersion

Interference

Reflection

Refraction

Dimensions of refractive index

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[M°L°T°]

[MLT]

[ML^-1T^-1]

None

Slope of velocity time graph gives

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Distance

Instantaneous acceleration

Instantaneous velocity

Instantaneous speed

For a gas obeying Boyle's law, if the pressure is doubled the volume becomes:

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One half

Double

Four times

None of these

For full wave rectification, the minimum number of diodes used is:

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1

2

3

4

The diameter of an atom is

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10^-7 m

10^-10 m

10^-12 m

10^-14 m

At what point/points in its path does a projectile have it minimum speed

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At the point of projection

At maximum height

All the point where it strikes the ground

None of these

The second law is concerned with the conversion of heat into work which the head added

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Equivalent

Greater

Lower

None of these

Shear modulus for glass is

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23

39

52

69

Due to Plano convex lens and the plane glass plate the thickness of air film changes from the center to outward

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Increasing gradually

Decreasing gradually

It is constant at the centre

None of these

The product of force times the perpendicular distance between some point and the line of action of the force is

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The moment of inertia action on it

The moment of force about the chosen point

The angular momentum of the body

None of these

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