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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-9 section-1

Each section contains 100 MCQs on Materials and Components .
81
In a superconductor the value of critical density depends upon
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Answer & Solution
Answer: Option D
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82
In scintillation coating applications, shields of which material are generally placed around the photomultiplier tube to overcome interference effects of electrons deflected from their normal path?
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Answer: Option B
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83
In a variable type carbon resistor the carbon track is formed of a mixture of a carbon, resin and
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Answer: Option A
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84
Consider the following statement : Extrinsic semiconductors show high electrical conductivity because the impurities are
1. of high conductivity
2. highly mobile
3. highly charged
Which of these statements are NOT correct?
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Answer: Option A
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85
Match List-I with List-II and select the correct answer using the options given below:
List-I List-II
a. Hexagonal crystal 1. a = b = c; γ = α = β ≠ 90º
b. Rhombohedral crystal 2. a = b ≠ c; α = β = 90º; γ = 120º
c. Triclinic crystal 3. a ≠ b ≠ c; α = β ≠ γ ≠ 90º
d. Monoclinic crystal 4. a ≠ b ≠ c; α ≠ γ ≠ 90º ≠ β
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Answer: Option B
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86
A resistance thermometer has a temperature coefficient of resistance 10-3 per degree and its resistance at 0°C is 1.0 Ω. At what temperature is its resistance 1.1 Ω?
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Answer: Option B
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87
Ceramic insulators undergo a glazing process to reduce the possibility of electric breakdown. What is the effect of this process?
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Answer: Option A
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88
Piezoelectric materials serve as a source of
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Answer: Option D
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89
The materials having permanent electric moment are called
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Answer: Option C
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90
The Electrical susceptibility and relative permittivity are related as:
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Answer: Option A
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