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

Answer»

Solution :`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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