Question # 1

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

substance which undergo plastic deformation until they break are known as.

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Brittle substances

Ductile substance

Non magnetic substance

Magnetic substance

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

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Free electrons

Holes

Protons

Mesons

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

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

Out of the following which material is brittle.

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Wrought iron

Copper

Tungsten

High steel carbon

Example of ductile substance is.

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Glass

Wood

Lead

Oxygen

Donor impurities are

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Germanium, silicon

Indium, galium

Antimony, arsenic

Diamond, carbon

Young's modulus for water's is

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Zero

1

2

3

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