Question # 1

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 vast majority of solids are in the form of

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amorphous structure

polymeric structure

crystalline structure

all of them

The force which maintain the strict long-range order between atoms of a crystalline solid is the:

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Nuclear force

Cohesive force

Adhesive force

Coulomb force

None of these

The pattern of crystalline solid is:

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One dimesional

Two dimensional

Three dimensional

Either (A) or (B)

None of these

Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at

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125 K

25 K

263 K

163 K

The first super conductor was discovered in

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1811

1890

1901

1911

Lead, copper and wrought iron are examples of

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brittle substances

ductile substances

plastic substances

elastic substances

The curie temperature of iron is about

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250°C

500°C

750°C

1000°C

Which of the following can become a good temporarily magnet

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iron

steel

both of them

none of them

Glass and high carbon steel are the examples of

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brittle substances

ductile substances

plastic substances

elastic substances

The ratio of linear stress/linear strain is called as

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Yong's modulus

Bulk modulus

Shear modulus

Modulus

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

Arsenic, antimony and phosphorus are the elements from

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third group

fourth group

fifth group

none of them

Whenever a covalent bond is broken in an intrinsic semi-conductor

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hole is created

an electron is created

an electron-hole pair is generated

all of them

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 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)

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

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