Question

.Asilver wire has a resistance of 4.2 ohm at 27 C and resistance 5.4ohm at
100 °c.
determine temperature coefficient of resistance .
​

Answer 1

Answer:

Temperature, T1 = 27.5°C

Resistance of the silver wire at T1, R1 = 2.1 Ω

Temperature, T2 = 100°C

Resistance of the silver wire at T2, R2 = 2.7 Ω

Temperature coefficient of silver = α

It is related with temperature and resistance

a= R2-R1/R1(T2-T1)

= 2.7-2.1/2.1(100-27.5)

= 0.0039 ° c

Therefore, the temperature coefficient of silver is 0.0039°C - 1.xplanation: