Materials And Components MCQs with Answers 2027

Q61

Match List-I with List-II and select the correct answer using the options given below:

List-I	List-II
a. No eddy current loss	1. Ferrimagnetic material
b. Small hysteresis	2. Soft magnetic material
c. Large hysteresis	3. Hard magnetic material
	4. Nonferrous material

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Q62

Open question

If a small amount of Cu is added to a Ni conductor, then the

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Q63

Open question

Given a ferrite material that we shall specify to be operating in a linear mode with B = 0.05 T, let us assume µ_r = 50, and calculate the approximate value for magnetization M.

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Q64

Open question

Unit of permeability is-

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Q65

Open question

The transition temperature of Mercury at which it becomes superconductive is

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Q66

Open question

Consider the following statements in connection with superconductors:
1. Transition temperature of a superconductor can be reduced by the application of magnetic field.
2. Transition from the superconducting to normal state under the influence of a magnetic field is irreversible.
Which of the statements given above is/are correct?

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Q67

Open question

A Type-I superconductor is
1. A conductor of infinite conductivity at all temperature.
2. A conductor with very large conductivity below a critical temperature.
3. A material showing susceptibility = -1 drastically reduced by a critical temperature.
4. A perfect conductor having conductivity drastically reduced by a critical current.
Which of these statements are correct?

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Q68

Open question

In the superconducting state, the flux lines of a magnetic field are ejected out of the superconductor as per

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Q69

Open question

The crystal structure of some Ceramic materials may be thought of being composed of electrically charged Cations and Anions, instead of Atoms, and as such

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Q70

Open question

Two ceramic capacitors have the following parameters. One has capacitance C₁ and ceramic thickness d₁. The other has capacitance C₂ and ceramic thickness d₂. When the two are connected in series, the combination has a capacitance of:

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Q71

Open question

Superconducting materials are used in which of the following application?
1. Magnetic Resonance Imaging (MRI).
2. Magnetic Resonance Spectroscopy (MRS).
3. High-speed switching and signal transmission for computers.
4. High-speed magnetically levitated trains.
Select the correct answer using the options given below:

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Q72

Open question

Consider the following statements for superconductivity:
1. Superconducting magnets capable of generating high fields with low power consumption are currently being employed in scientific test and research equipment.
2. One of the potential applications of superconducting materials is electrical power transmission through superconducting materials- power losses would be extremely low, and the equipment would operate at low voltage levels.
3. Type II superconductors are preferred over type I for most practical applications by virtue of their higher critical temperatures and critical magnetic fields.
Which of the above statements is/are correct?

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Q73

Open question

Hall effect may be used for which of the following?

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Q74

Open question

Consider the following statements regarding ceramic resonator circuits:
1. The specify larger load capacitance values than crystal circuits
2. They draw still more current than crystal circuit using the same amplifier
Which of the above statements is/are correct?

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Q75

Open question

If a material contains 10²⁰ molecules/m³, each molecule having a moment of 8.854 × 10^-27 C-m parallel to an electric field of 10⁵/m, then its dielectric constant is

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Q76

Open question

Which of the following pairs of crystal structure possesses the same atomic packing density?

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Q77

Open question

Super conductivity can be destroyed by

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Q78

Open question

The electrical conductivity of a semiconductor increases with increase in temperature because

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Q79

Open question

As temperature falls below the transition temperature, the value of critical magnetic field of superconductor

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Q80

Open question

Which of the following statements are correct for superconductors?
1. A substance loses its electrical resistance below certain temperature.
2. Superconducting elements have greater electrical resistivity at room temperature.
3. On adding impurities to super conducting elements its transition temperature is increased.

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Materials And Components
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