Question # 1

The most suitable metal for making permanent magnet is.

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Iron

Aluminium

Steel

Copper

Which type of impurity is to be added to a pure semi conductor crystal to provide holes.

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Monovalent

Trivalent

Tetravalent

Pentavalent

A material which is insulator at 0 K and conduct at room temperature is.

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Silver

Lead

Germanium

Polythene

The SI unit of Stress is:

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Nm

Nm²

NM^-2

Nm³

The domain theory of magnet is important to explain the behaviour of

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Diamagnets

Paramagnets

Ferromagnets

All of these

The ratio of applies stress to volumetric strain is called:

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Young modulus

Shear modulus

Bulk modulus

Tensile modulus

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

The dimension of stress is

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[MLT^-1]

[ML^-1T]

[ML^-1T^-1]

[ML^-1T^-2]

In extrinsic semiconductors doping is of the order of.

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1 atom to 10⁴

1 atom to 10⁶

1 atom to 10⁸

1 atom to 10³

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

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

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2

1

0

0.5

Very weak magnetic field produced by brain can be detected by

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MRI

CAT scans

Squid

CRO

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

Domains are existed in

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Ferromagnetic materials

Paramagnetic materials

Semi conductors

Diamagnetic materials

Which one is not a ductile material

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Lead

Steel

Copper

Wrought Iron

The curie temp for iron is about

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800^oC

740^oC

750^oC

650^oC

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Physics ICS Part 2 Chapter 17 Online MCQ's Test MCQs With Answers

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