Basic Electrical Engineering objective questions (mcq) and answers
16. The filament of an electric bulb is made of
A. Carbon
B. Aluminium
C. Tungsten
D. Nickel
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C. Tungsten
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17. Which of the following materials has a negative temperature coefficient of resistance?
A. Copper
B. Aluminium
C. Carbon
D. Brass
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18. Which of the following material has nearly zero temperature coefficient of resistance?
A. Manganin
B. Porcelain
C. Carbon
D. Copper
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19. The substance which have a large number of free electrons and offer a resistance are called
A. Insulators
B. Inductors
C. Semiconductors
D. Conductors
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20. The resistance of human body is around
A. 50 Ohms
B. 25 Ohmes
C. 250 Ohms
D. 1000 Ohm's
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