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If the resistance of coil is 3Omega at ...

If the resistance of coil is `3Omega` at `20^(@)C` and `alpha=0.004//^(@)C` then determine its resistance t `100^(@)C`.

Text Solution

Verified by Experts

`R_(0)=3Omega, T=100^(@)C, T_(0)=20^(@)C`
`alpha=0.004//^(@)C, R_(T)=?`
`R_(T)=R_(0)(1+alpha(T-T_(0)))`
`R_(100)=3(1+0.004xx80) rArr R_(100)=3(1+0.32)`
`R_(100)=3(1.32) rArr R_(100)=3.96Omega`
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