Question # 1

The measure of the deformation in a solid when stress is applied to its is called

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elastic constant

young's modulus

strain

elasticity

The modulus of elasticity can be written as

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stress x strain

strain/stress

1/2 x stress x strain

stress/strain

The crystalline structure of NaCI is

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rectangular

hexagonal

tetrahedral

cubical

Polymeric solids have

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low specific gravity

high specific gravity

either of them

none of them

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 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

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 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

When relatively simple molecules are chemically combined into massive molecules, the reaction is called:

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Fission reaction

Fusion reaction

Polymerization

Any of these

None of these

Each atom in metal crystal:

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Remains fixed

Vibrates about a fixed point

Moves randomly

Rotates about center of a crystal

None of these

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

Under the elastic region, the deformation produced in the material, the deformation produced in the material will be

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permanent

temporary

either of them

none of them

The SI unit of strain is

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N

Dynes

Pascal

Dimensionless

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

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