Question # 1

If both the length and radius of the rod are doubled, then the modulus of elasticity will:

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Increase

Decrease

Remains the same

Doubled

Energy band theory is based upon

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Hund's Rule

Heisenberg uncertainty principle

Bohr's atomic Model

Wave mechanical model

A pentaralent impurity in Si

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a free electron and a free hole

a free hole

a free electron

No free particle

The crystalline structure of NaCl is.

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Cubical

Hexagonal

Tri gonal

Tetragonal

Which of the following has bulk modulus?

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Water

Gas

Honey

All

The SI unit of Stress is:

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Nm

Nm²

NM^-2

Nm³

The dimension of stress is

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[MLT^-1]

[ML^-1T]

[ML^-1T^-1]

[ML^-1T^-2]

Domains are existed in

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Ferromagnetic materials

Paramagnetic materials

Semi conductors

Diamagnetic materials

Conductors have conductivities of order:

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10³(Ωm)-1

10⁷(Ωm)^-1

10⁷Ωm^-1

10^-6Ω

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

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Brittle substances

Ductile substance

Non magnetic substance

Magnetic substance

Which one pair belongs to acceptor impurity.

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Aresincl, phosphorus

Boron, gallium

Arsenic, antimony

Antimony, indium

Soft magnetic material is

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Sodium

Steel

Iron

Copper

Coercive force is used to

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Demagnetize the material

Magnetize the material

Extend it

None of these

The critical temperature of Aluminum is.

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3.72 K

1.18 K

7.2 K

8.2 K

Shear modulus is expressed as:

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G = tanθ/F/A

F/A/tanθ

F/tanθ

tanθ/A

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

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

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