Two wires of resistance R_(1) and R_(2) at 0^(@)C have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is :

Two wires of resistance R_(1) and R_(2) at 0^(@)C have temperature coe

1.	Two wires of resistance R_(1) and R_(2) at 0^(@)C have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is :
Answer» `(alpha_(1)+alpha_(2))/(2)` `SQRT(alpha_(1)alpha_(2))` `(alpha_(1)R_(1)+alpha_(2)R_(2))/(R_(1)+R_(2))` `(sqrt(R_(1)R_(2)alpha_(1)alpha_(2)))/(sqrt(R_(1)^(2)+R_(2)^(2)))` ANSWER :C

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Two wires of resistance R_(1) and R_(2) at 0^(@)C have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is :

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