$\mathrm{A}$ circuit is comprised of eight identical batteries and a resistor $R = 0.8\,\Omega$ . Each battery has an $\mathrm{emf}$ of $1.0\, V$ and internal resistance of $0.2\,\Omega$ . The voltage difference across any of the battery is ............. $V$
Diffcult
Download our app for free and get started
In loop $(1)$
$4-0.8 I-0.8\left(I-I_{1}\right)=0$
$2 I-I_{1}=5 \ldots(1)$
In loop $(2)$
$4-0.8 I_{1}+0.8\left(I-I_{1}\right)=0$
$-I+2 I_{1}=5 \ldots(2)$
From $(1)$ and $(2)$ $I_{1}=I=5 \mathrm{Amp}$
Voltage drop across any battery
$V=E-I r=1-5 \times 0.2=0 V$
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
- 1Two electric lamps of $40\, watt$ each are connected in parallel. The power consumed by the combination will be ........... $watt$View Solution
- 2In the circuit shown in figure reading of voltmeter is $V_1$ when only $S_1$ is closed, reading of voltmeter is $ V_2$ when only $S_2$ is closed and reading of voltmeter is $V_3$ when both $S_1$ and $S_2$ are closed. ThenView Solution
- 3Forty electric bulbs are connected in series across a $220\, V$ supply. After one bulb is fused, the remaining $39$ are connected again in series across the same supply. The illumination will beView Solution
- 4If a copper wire is stretched to increase its length by $20 \% $. The percentage increase in resistance of the wire is $..........\%$View Solution
- 5View SolutionIn charging a battery of motor-car, the following effect of electric current is used
- 6A wire of resistance $12\,ohms$ per meter is bent to form a complete circle of radius $10\, cm.$ The resistance between its two diametrically opposite points, $A$ and $B$ as shown in the figure isView Solution
- 7$A$ total charge $Q$ flows across a resistor $R$ during a time interval $= T$ in such a way that the current vs. time graph for $0 \rightarrow T$ is like the loop of a sin curve in the range $0 \rightarrow \pi$ . The total heat generated in the resistor isView Solution
- 8Two rods of copper and iron with the same cross-sectional area are joined at $S$ and a steady current $I$ flows through the rods as shown in the figure. Choose the most appropriate representation of charges accumulated near the junction $S$.View Solution
- 9When a potential difference $V$ is applied across a wire of resistance $R$, it dissipates energy at a rate $W$. If the wire is cut into two halves and these halves are connected mutually parallel across the same supply, the same supply, the energy dissipation rate will become:View Solution
- 10Water fall from a $40\,m$ high dam at the rate of $9 \times 10^{4}\,kg$ per $hour$. Fifty percentage of gravitational potential energy can be converted into electrical energy. Using this hydroelectric energy number of $100\,W$ lamps, that can be lit, isView Solution
(Take $\left.g=10\,ms ^{-2}\right)$