Two conductors have the same resistance at 0-C but their temperature coefficients of resistance are -1 and -2- The respectively temperature coefficients of their series and parallel combinations are nearly

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Standard XII

Physics

Mutual Induction

Two conductor...

Question

Two conductors have the same resistance at $0^{\circ} C$ but their temperature coefficients of resistance are $α_{1}$ and $α_{2}$ . The respectively temperature coefficients of their series and parallel combinations are nearly

\frac{α_{1} + α_{2}}{2}, \frac{α_{1} + α_{2}}{2}

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\frac{α_{1} + α_{2}}{2}, α_{1} + α_{2}

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α_{1} + α_{2}, \frac{α_{1} + α_{2}}{2}

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α_{1} + α_{2}, \frac{α_{1} α_{2}}{α_{1} + α_{2}}

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Solution

The correct option is A $\frac{α_{1} + α_{2}}{2}, \frac{α_{1} + α_{2}}{2}$
Note:- Multiplication of two are being ignore in calculation because they will be more small.

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