# NEET Physics Current Electricity Questions Solved

Two resistances R1 and R2 are made of different materials. The temperature coefficient of the material of R1 is α and of the material of R2 is –β. The resistance of the series combination of R1 and R2 will not change with temperature, if R1/ R2 equals

(1) $\frac{\alpha }{\beta }$

(2) $\frac{\alpha +\beta }{\alpha -\beta }$

(3) $\frac{{\alpha }^{2}+{\beta }^{2}}{\alpha \beta }$

(4) $\frac{\beta }{\alpha }$

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