Materials And Components MCQ Questions & Answers

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Learn Materials And Components MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Materials And Components MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-2 section-3

Each section contains 100 MCQs on Materials and Components .

Consider the following methods in nanoparticle synthesis:
1. Bottom-up
2. Top-down
3. Side-by-side
Which of these methods is/are slow and does/do not conduce to large-scale production?

A) 1 only B) 2 only C) 3 only D) 1, 2 and 3

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The transition temperature of superconducting material is changed by which one of the following?

A) Electric Field B) Magnetic Field C) Mechanical Stress D) None of these

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

In a solid or liquid dielectric with externally applied electric field, as the interatomic distance increases the internal field E_i,

A) Increases B) Decreases C) Remains unaltered D) Increases or decreases bases on the temperature

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

A semiconductor has generally . . . . . . . . valence electrons.

A) 2 B) 3 C) 6 D) 4

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Which of the following statements is not true regarding Rochelle salt?

A) It possesses anisotropic properties B) It is a salt of tartaric acid C) Its crystal possesses a centre of symmetry D) Its crystallizes in the orthorhombic system

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Which one of the following statements is NOT true?

A) Rochelle salt exhibits ferroelectric property B) Spontaneous polarization is a characteristic property of ferroelectric material C) Spontaneous polarization of ferroelectric materials usually vanishes below ferroelectric Curie temperature D) Ferroelectric materials exhibit hysteresis effect

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

In a material characterized by a complex permittivity, the imaginary part is a measure of

A) Dielectric strength of the material B) Energy stored in the electric field C) Losses in the material D) Energy stored in the magnetic field

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Heating a permanent magnet results in the loss of magnetic behavior because

A) The atoms start vibrating B) The magnetic dipoles start vibrating C) The magnetic dipoles start realigning D) The atoms start conducting

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The evidence for the importance of electron phonon interaction in super-conductors comes from

A) Meissner effect B) Josephon effect C) Isotope effect D) Flux quantization experiments

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Laser emission from Ruby crystal is because of transition

A) from conduction band to valence band Al₂O₃ B) from conduction band to one of the levels due to Cr ions C) between energy levels introduced by Cr ions D) between one of the levels due to Cr ion and valence band Al₂O₃

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

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Materials And Components MCQ Questions & Answers | ECE