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ESE (IES) Quiz : Materials & Components

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Question 1

The fuse material used in electrical lines must have which one of the following properties?

Question 2

Manganin, an alloy of copper and manganese, is used in

Question 3

In a crystal lattice, what are the vacancies created by the absence of certain atoms known as?

Question 4

Match List-I with List-II and select the correct answer using the code given below the lists:
List-I
A) Hexagonal crystal
B) Rhombohedral crystal
C) Triclininc crystal
D) Monoclinic crystal

List-II
1)

Question 5

Why are askerals not used as transformer or capacitor insulation?

Question 6

A solid specimen of dielectric has relative permittivity and loss angle tan at 50 Hz frequency. If it is subjected to an electrical stress of 50 kV/cm, what is the heat generated in the specimen due to dielectric loss?

Question 7

Which one of the following pairs is not correctly matched?

Question 8

Assertion (A): Magnetic current consists of entirely a displacement component and no conduction component.
Reason (R): Magnetic flux lines are always continuous.

Question 9

In a material, the Fermi-level is located between the centre of the valency band and the conduction band. Then what is that material?

Question 10

Ti is diffused into well-defined region of LiNbO₃ crystal. The following effects are expected:
1) An optical waveguide is formed in the region containing Ti.
2) Ti containing region has a larger refractive index than in undoped region.
3) Ti containing region has a lower refractive index than in undoped region.
Which of these statements are correct?

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ESE & GATE EC Material Science

Jun 5ESE & GATE EC