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  4. Variation of resistance of the conductor with temperature is as shown .The temperature co-efficient (α) of the conductor is

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Q. Variation of resistance of the conductor with temperature is as shown .The temperature co-efficient $(\alpha)$ of the conductor isPhysics Question Image

KCETKCET 2016Current Electricity

Solution:

$R_{t}=R_{0}(1+\alpha \Delta t)$
where, $\alpha$ is temperature coefficient of conductor
$=R_{0}+R_{0} \alpha \Delta T$
Slope of graph
$m=R_{0} \alpha $
$\therefore \alpha=\frac{m}{R_{0}}$
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