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Two materials have resistance temperature coefficients of 0.004 and 0.0002 respectively at a given temperature. In what ratio should the wires made of these materials be connected in series so as to have an overall temperature coefficient of 0.002?

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Two materials have resistance temperature coefficients of 0.004 and 0.0002 respectively at a given temperature. In 9:10 ratio should the wires made of these materials be connected in series so as to have an overall temperature coefficient of 0.002.

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