A cell of internal resistance $r$ is connected across an external resistance $n r$. Then the ratio of the terminal voltage to the emf of the cell is
AIIMS 2019, Medium
Download our app for free and get started
The ratio of terminal voltage and emf is calculated as,
$V=E-I r$
$=E-\frac{E r}{(n+1) r}$
$=E\left(1-\frac{1}{n+1}\right)$
$\frac{V}{E}=\frac{n}{n+1}$
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
- 1A cell of emf $6\, V$ and resistance $0.5\, ohm$ is short circuited. The current in the cell is ............... $amp$View Solution
- 2A potentiometer is an accurate and versatile device to make electrical measurements of $EMF$ because the method involvesView Solution
- 3The ammeter $A$ reads $2\, A$ and the voltmeter $V$ reads $20\, V$. the value of resistance $R$ is (Assuming finite resistance's of ammeter and voltmeter)View Solution
- 4The specific resistance of manganin is $50 \times {10^{ - 8}}\,ohm \times m$. The resistance of a cube of length $50\,cm$ will beView Solution
- 5A cell of $emf$ $E$ and internal resistance $r$ is connected in series with an external resistacne $nr.$ Then, the ratio of the terminal potential difference to $emf$ isView Solution
- 6View SolutionExpress which of the following setups can be used to verify Ohm’s law
- 7View SolutionThe mechanism of the heat produced in a conductor when an electric current flows through it, can be explained on the basis of
- 8The ammeter reading in the circuit below is .............. $A$View Solution
- 9The battery in the diagram is to be charged by the generator $G$. The generator has a terminal voltage of $120$ $\mathrm{volts}$ when the charging current is $10$ $\mathrm{amperes}.$ The battery has an $\mathrm{emf}$ of $100$ $\mathrm{volts}$ and an internal resistance of $1$ $\mathrm{ohm}.$ In order to charge the battery at $10$ $\mathrm{amperes}$ charging current, the resistance $R$ should be set at ................ $\Omega$View Solution
- 10Two bulbs of $100\, W$ and $200\, W$ working at $220$ $volt$ are joined in series with $220$ $volt$ supply. Total power consumed will be approximately ........... $watt$View Solution