
Unit 1 - ĐCN: Electrical Materials

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Other
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University
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Hard
Anh Nguyen
Used 4+ times
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20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A material that can be melted and formed into shapes that become hard, and can then be melted again
Thermosetting plastic material
Conducting material
Semiconducting material
Thermoplastic material
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A substance, such as silicon, that allows some electricity to flow through it, used in making electronic devices:
semiconductor
dielectric
Insulator
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many properties do the high resistivity materials have?
3
4
5
6
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The forbidden energy gap between valence and ............. band is very small.
Empty
Semiconducting
Conduction
Electrical
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Soft magnetic materials have small ............ of hysteresis loop, high permeability, high saturation value, low eddy current losses which are achieved by using laminated cores, less residual magnetism.
Large area
Enclosed area
Magnetic area
Resistant area
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The conducting materials are required to be joined and the joint must have minimum contact resistance. These materials must have a good ..........
Low temperature coefficient
Sufficient mechanical strength
Ductility
Solderability
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The material should have a high..........so that it should get oxidised when used in different environmental conditions.
Oxidation resistance
High melting point strength
High mechanical
Low temperature coefficient
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