Ten identical cells each emf 2 , V and intern | vedclass

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

Question

(C) Total number of cells $n = 10$. Each cell has emf $E = 2 \, V$ and internal resistance $r = 1 \, \Omega$.When two cells are connected in reverse,

Vedclass · Accepted Answer

$0.6$

Vedclass · Answer

(C) Total number of cells $n = 10$. Each cell has emf $E = 2 \, V$ and internal resistance $r = 1 \, \Omega$.When two cells are connected in reverse, they cancel the emf of two other cells. Thus, the effective number of cells contributing to the net emf is $n - 2m$, where $m$ is the number of wrongly connected cells.Here, $m = 2$, so effective cells = $10 - 2(2) = 6$ cells.Net emf $E_{	ext{net}} = (10 - 2 	imes 2) 	imes E = 6 	imes 2 = 12 \, V$.The total internal resistance remains the sum of all cells: $R_{	ext{int}} = 10 	imes r = 10 	imes 1 = 10 \, \Omega$.The external resistance $R = 10 \, \Omega$.Total resistance $R_{	ext{total}} = R_{	ext{int}} + R = 10 + 10 = 20 \, \Omega$.Using Ohm's law, the current $I = \frac{E_{	ext{net}}}{R_{	ext{total}}} = \frac{12}{20} = 0.6 \, A$.

Ten identical cells each emf $2 \, V$ and internal resistance $1 \, \Omega$ are connected in series with two cells wrongly connected. $A$ resistor of $10 \, \Omega$ is connected to the combination. What is the current through the resistor (in $ \, A$)?

Similar Questions

Eight identical cells,each having an electromotive force $E$ and internal resistance $r$,are connected in series to form a closed circuit. An ideal voltmeter is connected across $2$ cells. The voltmeter will read ........ $E$.

The variation of terminal potential difference $(V)$ with current $(I)$ flowing through a cell is as shown in the graph. The $EMF$ $(E)$ and internal resistance $(r)$ of the cell are:

If six identical cells each having an $e.m.f.$ of $6\,V$ are connected in parallel,the $e.m.f.$ of the combination is ................ $V$.

What is meant by the series connection of cells? Derive the equation for the equivalent electromotive force $(emf)$ of two cells with $emf$ $\varepsilon_1$ and $\varepsilon_2$ connected in series.

The $e.m.f.$ of a cell is $6 \ V$. When a current of $2 \ A$ flows through it,the potential difference across its terminals is $3 \ V$. The internal resistance of the cell is ............. $\Omega$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module