The internal resistances of two cells shown are $0.1\,\Omega $ and $0.3\,\Omega $. If $R = 0.2\,\Omega $, the potential difference across the cell
Medium
Download our app for free and get started
Applying Kirchhoff law
$(2 + 2) = (0.1 + 0.3 + 0.2)i$ $ \Rightarrow $ $i = \frac{{20}}{3}\,A$
Hence potential difference across $A$
$ = 2 - 0.1 \times \frac{{20}}{3} = \frac{4}{3}\,V$ (less than $2\,V$)
Potential difference across $B = 2 - 0.3 \times \frac{{20}}{3} = 0$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1View SolutionThe following four wires are made of the same material and are at the same temperature. Which one of them has highest electrical resistance
- 2What is the reading of voltmeter in the following figure .............. $V$View Solution
- 3An ammeter with internal resistance $90\,\Omega $ reads $1.85\, A$ when connected in a circuit containing a battery and two resistors $700\,\Omega $ and $410\,\Omega $ in series. Actual current will beView Solution
- 4In the circuit shown, the point ‘$B$’ is earthed. The potential at the point ‘$A$’ is ............. $V$View Solution
- 5An electric heater of resistance $6 \,ohm$ is run for $10$ minutes on a $120\, volt$ line. The energy liberated in this period of time isView Solution
- 6A series combination of two resistors $1\,\Omega $ each is connected to a $12\,V$ battery of internal resistance $0.4\,\Omega $. The current flowing through it will be ............... $A$View Solution
- 7In the circuit shown, $n$-identical resistors $R$ are connected in parallel $(n > 1)$ and the combination is connected in series to another resistor $R_0$. In the adjoining circuit $n$ resistors of resistance $R$ are all connected in series alongwith $R_0$. The batteries in both circuits are identical and net power dissipated in the $n$ resistors in both circuits is same. The ratio $R_0 / R$ isView Solution
- 8View SolutionThe alloys constantan and manganin are used to make standard resistance due to they have
- 9By using only two resistance coils-singly, in series, or in parallel one should be able to obtain resistances of $3$, $4$, $12$ and $16\, ohms$. The separate resistances of the coil areView Solution
- 10On an electric heater $220\, volt$ and $1100\, watt$ are marked. On using it for $4$ hours, the energy consumed in $kWh$ will beView Solution