Question # 1

Crystalline solids are in the form of:

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Metals

Ionic Compounds

Ceramics

Both (A) and (B)

All of these

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

The first super conductor was discovered in

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1811

1890

1901

1911

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

Within each domain, the magnetic field of all the spinning electrons are

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parallel

antiparallel

perpendicular

all of them

A structure of polymeric solid is:

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An ordered structure

A disordered structure

Intermediate between order and disorder

Any of these

None of these

Above the curie temperature, iron becomes

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ferromagnetic

paramagnetic

diamagnetic

any one of them

The conduction band in a solid

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may be empty

cannot be empty

should be filed

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 substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

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tiny regions

domains

vectors

none of them

The ratio of linear stress/linear strain is called as

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Yong's modulus

Bulk modulus

Shear modulus

Modulus

The ratio of shearing stress/shearing strain is called as

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Modulus

Pascal modulus

Hooker's modulus

Shear modulus

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 domains are of macroscopic size of the order of

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centimeters

meters

millimeters

nanomneters

A unit cell is smallest basic structure which is:

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One dimensional

Two dimensional

Three dimensional

Four dimensional

None of these

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