In a potentiometer arrangement, a cell of $emf$ $1.25\,V$ gives a balance point at $35.0\,cm$ length of the wire. If the cell is replaced by another cell and the balance point shifts to $63.0\,cm,$ the $emf$ of the second cell ............... $V$
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
- 1The effective resistance between $A$ and $B$, if resistance of each resistor is $R$, will beView Solution
- 2For a wire $\frac{R}{l}=\frac{1}{2}$ and length of wire is $l=5\, cm .$ If potential difference $1\, V$ is applied across it, current through wire will be: $( R =$ Resistance $)$ (in $A$)View Solution
- 3A copper wire of diameter $1.02\, mm$ carries a current of $1.7\, amp$. Find the drift velocity $(v_d)$ of electrons in the wire. Given $n$, number density of electrons in copper $= 8.5 \times 10^{27} /m^3$....................... $mm/sec$View Solution
- 4Find charge on the capacitor after $1$ sec of opening the switch at $t=\infty ?$View Solution
- 5Two resistances are connected in two gaps of a meter bridge. The balance point is $20\, cm$ from the zero end. A resistance of $15\, ohms$ is connected in series with the smaller of the two. The null point shifts to $40\, cm$. The value of the smaller resistance in $ohms$ isView Solution
- 6A current of $2\,A$ flows in a system of conductors as shown. The potential difference $({V_A} - {V_B})$ will be ............ $V$View Solution
- 7$12$ cells each having same $emf$ are connected in series with some cells wrongly connected. The arrangement is connected in series with an ammeter and two cells which are in series. Current is $3 \,A$ when cells and battery aid each other and is $2\, A$ when cells and battery oppose each other. The number of cells wrongly connected isView Solution
- 8Eight copper wire of length $l$ and diameter $d$ are joined in parallel to form a single composite conductor of resistance $R$. If a single copper wire of length $2\,l$ have the same resistance $(R)$ then its diameter will be $.....d$.View Solution
- 9In the figure, the value of resistors to be connected between $C$ and $D$ so that the resistance of the entire circuit between $A$ and $B$ does not change with the number of elementary sets used isView Solution
- 10A student obtained following observations in an experiment of meter bridge to find the unknown resistance of the circuit The most accurate value of unknown resistance is ............ $\Omega$View Solution
S.No. $R$ $l$ $100-l$ $S = \left( {\frac{{100 - l}}{l}} \right)R$ $1$ $20\,\Omega $ $43$ $57$ $26.51\,\Omega $ $2$ $30\,\Omega $ $51$ $49$ $28.82\,\Omega $ $3$ $40\,\Omega $ $59$ $41$ $27.80\,\Omega $ $4$ $60\,\Omega $ $70$ $30$ $25.71\,\Omega $