Question

The voltage V and current I graphs for a conductor at two different temperatures $\mathrm { T } _ { 1 }$ and are shown in the figure. The relation between $\mathrm { T } _ { 1 }$ and is

• A. $\mathrm { T } _ { 1 } > \mathrm { T } _ { 2 }$
• B. $\mathrm { T } _ { 1 } < \mathrm { T } _ { 2 }$
• C. $\mathrm { T } _ { 1 } = \mathrm { T } _ { 2 }$
• D. $\mathrm { T } _ { 1 } = \frac { 1 } { \mathrm {~T} _ { 2 } }$

Answer 1

Answer: (A)

$\mathrm { T } _ { 1 } > \mathrm { T } _ { 2 }$

Answer 2

:

The slope of $V - I$ graph gives the resistance of a conductor at a given temperature.

From the graph, is greater than at temperature . As the resistance of a conductor is more at higher temperature and less at lower temperature, hence .