In the circuit shown below,the resistance and | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) From the given $V-I$ graph:$1$. From $E$ to $F$:The graph is a straight line passing through the origin,so $V = IR$. The slope is constant,$R = \f

Vedclass · Accepted Answer

Vedclass · Answer

(D) From the given $V-I$ graph:$1$. From $E$ to $F$:The graph is a straight line passing through the origin,so $V = IR$. The slope is constant,$R = \frac{V}{I} = \frac{V_0}{I_0} = R_0$. Thus,the resistance remains constant at $R_0$.$2$. From $F$ to $G$:The voltage $V$ is constant at $V_0$,while the current $I$ increases from $I_0$ to $2I_0$. The resistance $R = \frac{V}{I}$ changes from $\frac{V_0}{I_0} = R_0$ to $\frac{V_0}{2I_0} = \frac{R_0}{2}$. Since $I$ increases linearly with time,$R$ decreases from $R_0$ to $\frac{R_0}{2}$.$3$. From $G$ to $H$:The current $I$ is constant at $2I_0$,while the voltage $V$ increases from $V_0$ to $2V_0$. The resistance $R = \frac{V}{I}$ changes from $\frac{V_0}{2I_0} = \frac{R_0}{2}$ to $\frac{2V_0}{2I_0} = R_0$. Since $V$ increases linearly with time,$R$ increases from $\frac{R_0}{2}$ to $R_0$.Comparing these variations with the given options,the correct plot is represented by option $(d)$.

Similar Questions

$A$ battery is charged by a $15\,V$ battery for $8\,h$ at a current of $10\,A$. When this battery discharges, it provides a current of $5\,A$ for $15\,h$. The average terminal voltage during discharge is $14\,V$. What is the $watt-hour$ efficiency of this battery in $\%$?

$A$ cell having an emf $\varepsilon$ and internal resistance $r$ is connected across a variable external resistance $R$. As the resistance $R$ is increased,the plot of potential difference $V$ across $R$ is given by:

$A$ cable consists of a copper wire of radius $9 \, mm$ having a resistance of $5 \, \Omega$. If this cable is replaced by $6$ copper wires each of radius $3 \, mm$,what will be the new resistance of the cable in $\Omega$?

In the circuit shown in the figure,the $5\,\Omega$ resistance develops $20.00\,cal/s$ due to the current flowing through it. The heat developed in the $2\,\Omega$ resistance (in $cal/s$) is

Vedclass Test Series

Exam Paper Generator

Online Exam Module