10. The following table gives the resistivity of: Three samples:
Resistivity - 1.6×10^-8 -5.2×10^-8 - 100×10^-6 ohm m
Which of these is suitable for making heating elements of electrical appliances and why?
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The standard resistors are made of materials for which the resistivity is quite large and effect of change of temperature on their resistance is negligible. So C is suitable for heating elements of electrical appliances among the given as it has more resistivity 100 ⨯100⨯10 -8 Ω m = 10,000 ⨯ 10 -8 Ω m
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Answer:
C
Explanation:
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