A battery consists of a variable number n of | vedclass

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

Question

(D) When $n$ identical cells,each with $EMF$ $E$ and internal resistance $r$,are connected in series,the total $EMF$ of the battery is $nE$ and the to

Vedclass · Accepted Answer

Vedclass · Answer

(D) When $n$ identical cells,each with $EMF$ $E$ and internal resistance $r$,are connected in series,the total $EMF$ of the battery is $nE$ and the total internal resistance is $nr$.When the terminals of the battery are short-circuited,the current $I$ flowing through the circuit is given by:$I = \frac{	ext{Total EMF}}{	ext{Total Resistance}} = \frac{nE}{nr} = \frac{E}{r}$Since $E$ and $r$ are constants for the given cells,the current $I$ is independent of the number of cells $n$. Therefore,the graph of $I$ versus $n$ is a horizontal straight line,indicating that $I$ remains constant as $n$ varies.

Similar Questions

$A$ 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:

The thermo emf of a hypothetical thermocouple varies with the temperature $\theta$ of the hot junction as $E = a\theta + b\theta^2$ in volts,where the ratio $a/b$ is $700^{\circ}C$. If the cold junction is kept at $0^{\circ}C$,then the neutral temperature is:

$A$ cell of emf $\varepsilon$ and internal resistance $r$ is connected across a variable load resistance $R$. The graph drawn between its terminal voltage $V$ and resistance $R$ is

In a copper voltameter,the mass of copper deposited in $6 \, \text{min}$ is $m \, \text{g}$. If the current-time graph is as shown in the figure,the electrochemical equivalent of copper will be:

Total $emf$ produced in a thermocouple does not depend on

Vedclass Test Series

Exam Paper Generator

Online Exam Module