Question

1. The resistance of a nichrome wire at
20°C is 10ohm .If its temperature coefficient
of resistivity of nichrom is 0.004/°C, find
the resistance of the wire at boiling point
of water. Comment on the result.

As the temperature increases the resistance
of the wire also increase.(answer the question step by step) ​

Answer 1

Answer:

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Explanation:

Answer 2

Answer:

Explanation:

Resistance of a nichrome wire at 0°C, RO = 10 Temperature co-efficient of

resistance,

a = 0.004/°C

Resistance at boiling point of water, RT

= ?

Temperature of boiling point of water, T = 100 °C

RT =RO (1+ aT) = 10[1 + (0.004 x 100)]

RT = 10(1 +0.4)

= 10 x 1.4 R = 14 Q