Question # 1

Which of the following has bulk modulus?

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Water

Gas

Honey

All

To get N-Type the Ge is doped with

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Aluminium

Arsenic

Boron

Indium

Yield stress is another name of

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Plasticity

Proportional limit

Elastic limit

Both (b) and (c)

In glass, molecules are irregularly arranged so it is known as.

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Solid

Liquid

Solid liquid

Gas

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

The solid with definite M.L are called:

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Crystalline

Amorphous

Polymeric

None of above

Glass and high steel carbon are example of.

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Ductile substances

Brittle substances

Soft substances

Hard substances

Shear modulus is expressed as:

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G = tanθ/F/A

F/A/tanθ

F/tanθ

tanθ/A

A semiconductor in its extremely pure form is known as:

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Intrinsic

Extrinsic

Both a and b

None of above

Out of the following which material is brittle.

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Wrought iron

Copper

Tungsten

High steel carbon

Which type of impurity is to be added to a pure semi conductor crystal to provide holes.

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Monovalent

Trivalent

Tetravalent

Pentavalent

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

Very weak magnetic field produced by brain can be detected by

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MRI

CAT scans

Squid

CRO

The SI unit of stress is same as that of.

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Pressure

Force

Momentum

Work

Which one is pentavalent impurity

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Boron

Gallium

Antimony

Indium

Natural rubber is an example of:

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Crystalline solids

Amorphous solids

Polymeric solids

None of above

The substance which atom cooperates with each other in such a way so as to exhibit a strong magnetic field is called.

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Ferromagnetic

Paramagnetic

Diamagnetic

Non magnetic

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