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The temperature coefficient of the resis...

The temperature coefficient of the resistance of a wire is `0.00125 per .^(@)C` . At 300 K its resistance is `1Omega`. The resistance of wire will be `2 Omega` at

A

1154 K

B

1100K

C

1400K

D

1127K

Text Solution

Verified by Experts

The correct Answer is:
B
b. `R_2 = R_1 (1+alphaDeltaT)`
`2 = 1(1+00125 xx DeltaT) or DeltaT = 1/(0.00125) = 800`
or `T_2 - T_1 = 800 or T_2 = 800 + T_1 = 800 + 300 = 1100K` .
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