Question # 1

There is a regular arrangement of molecules in a

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amorphous solids

polymeric solids

crystalline solids

none of them

The whole structure obtained by the repetition of unit cells is called:

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Crystal lattice

Amorphous solid

Polymeric solid

Polysterne

None of these

The doped semi-conductor materials are known as

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intrinsic semi-conductor

extrinsic semi-conductor

either of them

none of them

Amorphous solids are also more like

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crystalline solids

gases

liquids

any one of them

The ratio of shearing stress/shearing strain is called as

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Modulus

Pascal modulus

Hooker's modulus

Shear modulus

A unit cell is smallest basic structure which is:

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One dimensional

Two dimensional

Three dimensional

Four dimensional

None of these

The valence band of an atom in a solid

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is always empty

may or may not be empty

can never be empty

none of them

The neighbours of every molecule in crystalline solids are arranged in

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an irregular manner

a regular manner

any manner

none of them

The electrons occupying the conduction band are known as

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conduction electrons

free electrons

both of them

none of them

The substance in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero,are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

The arrangement or molecules or atoms in a crystalline solid can be studied by using:

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Chemical methods

Neutrons

X-ray techniques

Copper atoms

Both (A) and (B)

Crystalline solids are in the form of:

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Metals

Ionic Compounds

Ceramics

Both (A) and (B)

All of these

The greatest stress that a material can endure without losing the proportionality between stress and strain is called

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plastic line

breaking point

proportional limit

none of them

The substance in which atoms cooperate with each other in such a way so as to exhibit a strong magnetic effect, are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

In the phenomenon of hysteresis

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magnetism leads the magnetising current

magnetism lags behind the magnetising current

meganetism goes along the magnetising current

none of them

In metallic crystals which of the following thing remains constant

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amplitude of oscillations

temperature of solid

average atomic positions

all of them

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Physics ECAT Pre Engineering Chapter 17 Physics of Solid Online Test MCQs With Answers

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