Question

The $I-V$ characteristics of a metal wire at two different temperatures $\left(T_{1}\right.$ and $T_{2}$ ) are given in the adjoining figure. Here, we can conclude that

• A. $T _{1} >\, T_{2}$
• B. $T _{1} <\, T_{2}$
• C. $T _{1} = T_{2}$
• D. $T_{1}\,=2 T_{2}$

Answer 1

Answer: (B)

$R$ increases with temperature and slope of $V-I$ graph gives resistance so $T_{1} < T_{2}$.