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ESE 2020: Material Science and Engineering Quiz 3

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Question 1

Electrical conductivity, thermal conductivity and magnetic properties of ceramic material are

Question 2

Material suitable for permanent magnets are

Question 3

What is the study of the magnetic properties and behaviour of electrically conducting fluids?

Question 4

Consider the following properties of electromagnetic waves:
1. These waves do not require any material medium to propagate
2. Both electric and magnetic field vector are parallel to each other and perpendicular to the direction of propagation of waves
3. The energy in electromagnetic wave is divided equally between electric and magnetic vectors
4. Both electric and magnetic field vectors attain the maxima and minima at the same place and the same time
Which of the above properties of electromagnetic waves are correct?

Question 5

Hysteresis loops for two magnetic material A and B are given below:

These materials are used to make magnets for electric generators, transformer core and electromagnet core. The it is proper to use:

Question 6

Direction: Each of these questions contains two statements. Assertion and Reason Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.

Assertion (A): Above Curie temperature, a ferromagnetic material becomes paramagnetic.
Reason (R): When a magnetic material is heated to very high temperature, it loses its magnetic properties.

Question 7

Materials in superconducting state have the property of

Question 8

Magnetic materials which may be readily magnetized in either direction are

Question 9

The main difference between electric lines of force and magnetic lines of force is

Question 10

Soft magnetic materials should have

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ESE & GATE CE General Studies & Engineering Aptitude

Dec 21ESE & GATE CE