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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

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`R_(0)=3ohm,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 + 0.004 + 80)`
`implies R_(100)=3(1 + 0.32)`
`implies R_(100)=3.96 ohm`
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