Question # 1

A unit cell is smallest basic structure which is:

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One dimensional

Two dimensional

Three dimensional

Four dimensional

None of these

Each atom in a metal crystal vibrates about a fixed point with an amplitude that:

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Decrease the rise in temprature

Is not affected by rise in temprature

Increase with rise in temprature

Both (B) and (C)

None of these

Glass and high carbon steel are the examples of

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brittle substances

ductile substances

plastic substances

elastic substances

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

In a semi-conductor material, the total current is

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only the +ve current

only the electronic current

sum of +ve and electronic current

all of them

Above the curie temperature, iron becomes

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ferromagnetic

paramagnetic

diamagnetic

any one of them

The critical temperature of aluminium is

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1.18 K

4.2 K

3.72 K

7.2 K

The transition from solid to liquid is actually from:

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Order to disorder

Disorder to order

Order to order

Disorder to disorder

None of these

Tick the one which is not a crystalline solid:

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Zirconia

Glass

Copper

Ceramic solid

An ionic compound

The conduction band in a solid

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may be empty

cannot be empty

should be filed

all of them

The number of different crystals systems based on the geometrical arrangement of their atoms and the resultant geometrical structure are

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5

7

9

14

when the deformation produced in the material become permanent, this type of behaviour is called

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proportionality

elasticity

plasticity

none of them

In case of the three dimensional deformation, when volume is involved, the ratio of applied stress to volumetric strain is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

Semi-conductor elements have atoms with

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2 valence electrons

3 valence electrons

4 valence electrons

5 valence electrons

In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as

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plastic limit

plastic deformation

proportional limit

elastic behaviour

The critical temperature of tin is

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1.18 K

4.2 K

3.72 K

7.2 K

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

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