Question

The resistance $R$ of a conductor varies with temperature as shown in the given figure. If the relation between $R$ and $t$ is given as,
$R_t=R_0(1+\alpha +\beta t^2)$, then

• A. $\alpha$ and $\beta$ are negative
• B. $\alpha$ is positive but $\beta$ is negative
• C. $\alpha$ and $\beta$ are positive
• D. $\alpha$ is negative but $\beta$ is positive

Answer 1

The correct option is C $\alpha$ and $\beta$ are positive

Since, the value of $R$ continuously increases, both $\alpha ,\beta$ must be positive
Actually, the components of the given equation are as follows
As, $R$ increases, $\alpha ,\beta$ must be positive