Resistance of the wire is measured as at 10°C and 30°C respectively. Temperature co-efficient of resistance of the material of the wire is:
Resistance of the wire is measured as at 10°C and 30°C respectively. Temperature co-efficient of resistance of the material of the wire is:
Option 1 -
0.033°C-1
Option 2 -
-0.033°C-1
Option 3 -
0.011°C-1
Option 4 -
0.055°C-1
Asked by Shiksha User
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1 Answer
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Correct Option - 1
Detailed Solution:RT = R0
at t = 10°C, RT = 2
2 = R0 (1 + [10 – T0])- (1)
at T = 30°C, RT = 3
3 = (2)
from (1)
(3)
from (2) 3 = R0 (1 + 30) - (4)
3 + 30 = 2T 60α =
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