I - V graph for a metal at temperatures t1, t2, t3 are given. Temperatures are related as

Question

I - V graph for a metal at temperatures t1, t2, t3 are given. Temperatures are related as (A) t1 > t2 > t3 (B) t1 = t2 = t3 (C) t3 > t2 > t1 (D) t2 > t1 < t3

Tardigrade Admin · Accepted Answer

Slope of the graph m = (dI/dV) = (1/R) m1 < m2 < m3 or R1 > R2 > R3 Resistance of metal wire increases with the increase in temperature. HEnce , for same V and I , t1 > t2 > t3

Q. $I - V$ graph for a metal at temperatures $t_{1}, t_{2}, t_{3}$ are given. Temperatures are related as

$t_{1} > t_{2} > t_{3}$

$t_{1} = t_{2} = t_{3}$

$t_{3} > t_{2} > t_{1}$

$t_{2} > t_{1} < t_{3}$

Slope of the graph
$m = \frac{d I}{d V} = \frac{1}{R}$
$m_{1} < m_{2} < m_{3}$
or $R_{1} > R_{2} > R_{3}$
Resistance of metal wire increases with the increase in temperature.
HEnce , for same $V$ and $I, t_{1} > t_{2} > t_{3}$

Q. I−V graph for a metal at temperatures t1​,t2​,t3​ are given. Temperatures are related as

t1​>t2​>t3​

t1​=t2​=t3​

t3​>t2​>t1​

t2​>t1​<t3​

Slope of the graph m=dVdI​=R1​ m1​<m2​<m3​ or R1​>R2​>R3​ Resistance of metal wire increases with the increase in temperature. HEnce , for same V and I,t1​>t2​>t3​