Two resistance R1 and R2 are made of different materials. The temperature coefficient of the material of R1 is α and that of the material of R2 is −β. The resistance of the series combination of R1 and R2 does not change with temperature, then the ratio of resistance of the two wires at 0∘C will be:

Two resistance R1 and R2 are made of different materials. The temperat

1.	Two resistance R1 and R2 are made of different materials. The temperature coefficient of the material of R1 is α and that of the material of R2 is −β. The resistance of the series combination of R1 and R2 does not change with temperature, then the ratio of resistance of the two wires at 0∘C will be:
Answer» Two resistance $R_{1}$ and $R_{2}$ are made of different materials. The temperature coefficient of the material of $R_{1}$ is $α$ and that of the material of $R_{2}$ is $- β$ . The resistance of the series combination of $R_{1}$ and $R_{2}$ does not change with temperature, then the ratio of resistance of the two wires at $0^{\circ} C$ will be:

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