In the given figure, there is a circuit of potentiometer of length $A B=10 \,{m}$. The resistance per unit length is $0.1 \,\Omega$ per ${cm}$. Across ${AB}$, a battery of emf ${E}$ and internal resistance ' ${r}^{\prime}$ is connected. The maximum value of emf measured by this potentiometer is : (In $V$)
JEE MAIN 2021, Medium
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 Daniel cell is balanced on $125\,cm$ length of a potentiometer wire. Now the cell is short-circuited by a resistance $2\, ohm$ and the balance is obtained at $100\,cm$. The internal resistance of the Daniel cell is .............. $ohm$View Solution
- 2A current of $15\,mA$ flows in the circuit as shown in figure. The value of potential difference between the points $A$ and $B$ will be $...\,V$View Solution
- 3The resistances in $WSB$ circuit shown in the diagram all are different and the current through the galvanometer is zero. If all thermal effects are negligible, the current through the galvanometer will not be zero, whenView Solution
- 4Two resistances ${R_1}$ and ${R_2}$ when connected in series and parallel with $120\, V$ line, power consumed will be $25\, W$ and $100\, W$ respectively. Then the ratio of power consumed by ${R_1}$ to that consumed by ${R_2}$ will beView Solution
- 5In the circuit shown in figure, all cells are ideal. The current through $2 \,\Omega$ resistor is ............ $A$View Solution
- 6View SolutionThermopile is used for
- 7A $60\, watt$ bulb carries a current of $0.5\, amp$. The total charge passing through it in $1$ hour is ............ $coulomb$View Solution
- 8Two conductors are made of the same material and have the same length. Conductor $A$ is a solid wire of diameter $1.0\, mm$. Conductor $B$ is a hollow tube of outside diameter $2.0\, mm$ and inside diameter $1.0\, mm$. The resistance ratio $R_A/R_B$ will beView Solution
- 9What is the reading of voltmeter in the following figure .............. $V$View Solution
- 10In the circuit shown, $R_1$ is increased. What happens to the reading of the voltmeter (ideal)?View Solution
