Question

for a metallic conductor voltage versus current graph is drawn at two different temprature T1 and T2 . from the graph
(A) T1=T2
(B)
$t1 > t2$
(C)
$T2 < t2$
(D) nothing can be decided
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Answer 1

Answer:

(B) T1>T2

for a metallic conductor

resistance is directly proportional to to temperature

at high temperature resistance is higher and current is less for the same voltage

therefore answer is T1>T2

Answer 2

Slope of Voltage current graph gives the resistance. Since slope of T1 is greater than T2; Resistance of T1 is greater than T2. We know that for a metallic conductor, lower resistance is lower temperature therefore T2 is lesser than T1 .

Answer : b) T1>T2