Question

If the resistance of coil is 1 at 0 and = 0.004/ then determine its resistance at 100

Answer 1

QUESTION -

If the resistance of coil is 1Ω at 0° C and = 0.004/ then determine its resistance at 100°C

ANSWER -

___________ 1.4 Ω __________

Relation between resistance and temperature is given by

R = R₀[1 + α × (T - T₀) ]

Here R is the resistance at temperature T

R₀ is the temperature at temperature T₀

α is the constant

Here, R₀ = 1Ω , T = 100°C , T₀ = 0°C and α = 0.004 /°C

Now, R = 1[1 + 0.004 × (100 -0)]

= 1[1 + 0.004 × 100]

= 1 [1 + 0.4]

= 1 × 1.4

= 1.4 Ω