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The resistance of a bulb filmanet is 100...

The resistance of a bulb filmanet is `100Omega` at a temperature of `100^@C`. If its temperature coefficient of resistance be 0.005 per `.^@C`, its resistance will become `200 Omega` at a temperature of

A

`300^(@)` C

B

`400^(@)` C

C

`500^(@)` C

D

`200^(@)` C

Text Solution

Verified by Experts

The correct Answer is:
B
`alpha =(R_(2)-R_(1))/(R_(1)t_(2) -R_(2)t_(1))`
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