Materials And Components MCQ Questions & Answers

Materials And Components MCQ Questions & Answers | ECE

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-4 section-1

The number of protons in a copper atom are

A) 2 B) 9 C) 11 D) 29

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Answer & Solution

Answer: Option D

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With increase in temperature, the electrical conductivity would

A) Increase in metals as well as in intrinsic semiconductor B) Increase in metals but decrease in intrinsic semiconductor C) Decrease in metals but increase in intrinsic semiconductor D) Decrease in metals as well as in intrinsic semiconductor

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Answer & Solution

Answer: Option C

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If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant.

A) True B) False

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Answer & Solution

Answer: Option A

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The elements which become superconducting at extremely low temperatures are

A) Good conductors at room temperature B) Ferromagnetic at room temperature C) Relatively poor conductors at room temperature D) Insulators at room temperature

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Answer & Solution

Answer: Option C

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The number of protons in a silicon atom are

A) 4 B) 8 C) 12 D) 14

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Answer & Solution

Answer: Option D

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The residual resistivity of a binary alloy at 0 K is

A) Sum of residual resistivities of component metals B) Difference of residual resistivities of component metals C) Product of residual resistivities of component metals D) Dependent on the concentration of minor component in the alloy

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Answer & Solution

Answer: Option D

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Nickel is a non-magnetic material.

A) True B) False

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Answer & Solution

Answer: Option B

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The most important set of specifications of transformer oil include

A) dielectric strength and viscosity B) dielectric strength and flash point C) viscosity and flash point D) flash point and viscosity

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Answer & Solution

Answer: Option A

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

A) Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni B) Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres C) Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects D) Resistivity of Ni remains the same

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Answer & Solution

Answer: Option C

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The fact that domains exhibits spontaneous magnetisation is

A) First hypothesis is of Curie B) Second hypothesis is of Weiss C) Curie-Weiss law D) Boltzmann’s statistics

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Answer & Solution

Answer: Option B

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