(A) For a conductor,the resistance $R$ is given by the slope of the $V-I$ graph,where $R = \frac{V}{I}$.From the figure,the slope of the line correspo

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(A) For a conductor,the resistance $R$ is given by the slope of the $V-I$ graph,where $R = \frac{V}{I}$.From the figure,the slope of the line corresponding to $T_{1}$ is greater than the slope of the line corresponding to $T_{2}$.Therefore,$R_{1} > R_{2}$.For a metallic conductor,the resistance increases with an increase in temperature $(R \propto T)$.Since $R_{1} > R_{2}$,it follows that $T_{1} > T_{2}$.

Class 12 Physics Current Electricity Ohm's Law

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The voltage $V$ and current $I$ graph for a conductor at two different temperatures $T_{1}$ and $T_{2}$ is shown in the figure. The relation between $T_{1}$ and $T_{2}$ is

KCET 2011 All KCET

A
$T_{1} > T_{2}$
B
$T_{1} < T_{2}$
C
$T_{1} = T_{2}$
D
$T_{1} = \frac{1}{T_{2}}$

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Select the correct statement.

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An electric wire is connected across a cell of $e.m.f.$ $E$. The current $I$ is measured by an ammeter of resistance $R$. According to Ohm's law,which of the following relations is correct?

Easy

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From the graph between current $I$ and voltage $V$ shown below,identify the portion corresponding to negative resistance.

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The $V-i$ graph for a conductor makes an angle $\theta$ with the $V$-axis. Here $V$ denotes the voltage and $i$ denotes the current. The resistance of the conductor is given by:

Medium

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

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The voltage $V$ and current $I$ graph for a conductor at two different temperatures $T_{1}$ and $T_{2}$ is shown in the figure. The relation between $T_{1}$ and $T_{2}$ is

Similar Questions

Select the correct statement.

An electric wire is connected across a cell of $e.m.f.$ $E$. The current $I$ is measured by an ammeter of resistance $R$. According to Ohm's law,which of the following relations is correct?

From the graph between current $I$ and voltage $V$ shown below,identify the portion corresponding to negative resistance.

The $V-i$ graph for a conductor makes an angle $\theta$ with the $V$-axis. Here $V$ denotes the voltage and $i$ denotes the current. The resistance of the conductor is given by:

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

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