MCQ
Two resistances $R_1$ arid $\kappa_2$ are made of different materials. The temperature coefficient of the material of $R_1$ is $\alpha$ and of the material of $R_2$ is $-\beta$. The resistance of the series combination of $R_1$ and $R_2$ will not change with temperature, if $R_1 / R_2$ equals
- A$\frac{\alpha}{\beta}$
- B$\frac{\alpha+\beta}{\alpha-\beta}$
- C$\frac{\alpha^2+\beta^2}{\alpha \beta}$
- ✓$\frac{\beta}{\alpha}$
