Question # 1

Curie temperature is

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Differen for chromium oxide and cobalt

Same for chromium oxide and cobalt

Same for iron and cobalt

None of these

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

Donor impurities are

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Germanium, silicon

Indium, galium

Antimony, arsenic

Diamond, carbon

Curie temperature is a point where :

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Diamagnetism changes to paramagnetism

Paramagnetism changes to Diamagnetism

Ferromagnetism changes to paramagnetism

Paramagnetism changes to Ferromagnetism

the substances in which the atoms do not form magnetic dipoles are called.

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Diamagnetic

Para magnetic

Ferro magnetic

Crystal

Which one pair belongs to acceptor impurity.

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Aresincl, phosphorus

Boron, gallium

Arsenic, antimony

Antimony, indium

A wire stretched to double of its length, its strain is:

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2

1

0

0.5

A cable breaks if stretched by more than 2mm. It is cut into two equal parts. How much either part can be stretched without breaking?

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25 m

1mm

2mm

0.5 m

Recentaly a complex crystalline structure known as yttrium barium copper oxide (Yba₂Cu₃O₃) have reported to become super conductor at

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163 K

169 K

200 K

100 K

The curie temp for iron is about

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800^oC

740^oC

750^oC

650^oC

Natural rubber is an example of:

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Crystalline solids

Amorphous solids

Polymeric solids

None of above

Which one is not a crystalline solid.

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Zinc

Copper

Nylon

None of these

The material whose resistivity becomes zero below a certain temperature

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Conductors

Semi conductors

Super conductors

Insulators

The substance which atom cooperates with each other in such a way so as to exhibit a strong magnetic field is called.

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Ferromagnetic

Paramagnetic

Diamagnetic

Non magnetic

The number of crystal system are

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Three

Five

Seven

Fifteen

Minority carriers in P-Types , substances are.

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Electrons

Protons

Holes

Neutrons

Yield stress is another name of

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Plasticity

Proportional limit

Elastic limit

Both (b) and (c)

Soft magnetic material is

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Sodium

Steel

Iron

Copper

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Ics Part 2 Physics Chapter 6 Test Online MCQs With Answers

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