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Electrical Engineering Materials - Interview Questions and Answers

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56. The metal having the lowest temperature coefficient of resistance is
A. gold
B. copper
C. aluminium
D. kanthal
Explanation:
57. Which of the following materials is used for making coils of standard resistances ?
A. Copper
B. Nichrome
C. Platinum
D. Manganin
Explanation:
58. Low resistivity materials are used in
A. transformer, motor and generator windings
B. transmission and distribution lines
C. house wiring
D. all above applications
Explanation:
59. Carbon rods are used in wet and dry cells because
A. carbon rod serves as conductor
B. carbon can resist the attack of bat�tery acid
C. both (a) and (b)
D. either (a) or (b)
Explanation:
60. Which of the following are non-conductors of electricity?
A. Non-metal solids except carbon
B. Air and most other gases
C. Pure water and liquids in general except mercury
D. All of the above
Explanation:
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