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The temperature coefficient of resistanc...

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

A

1154 K

B

1100 K

C

1400 K

D

1127 K

Text Solution

Verified by Experts

The correct Answer is:
B
`R_theta = R_(theta_0) [1 +alpha(theta - theta_0)]`
`2 = 1[1 + 0.00125 (theta - 300)]`
`theta = (1)/(0.00125) + 300 = 1100 K`.
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