152511 Two cells $P$ and $Q$ each of emf $2.16 \mathrm{~V}$ are connected in series with a resistor of $19.6 \Omega$. An ideal voltmeter reads $2 \mathrm{~V}$, when connected across the cell $P$ and $1.92 \mathrm{~V}$ when connected across the cell $Q$. the ratio of the internal resistances of the cell $P$ and $Q$ is
152513
The emfs of three cells connected in parallel are
$E_{1}=5 \mathrm{~V}, E_{2}=8 \mathrm{~V}$ and $E_{3}=10 \mathrm{~V}$ and their internal resistances are $R_{1}=1 \Omega, R_{2}=2 \Omega$ and $R_{3}$ $=3 \Omega$ respectively. By changing $E_{3}$ to $E_{3 n}$, the equivalent emf is doubled, then $E_{3 N}$ in $V$ is
152514 In a potentiometer experiment two cells of emf $E_{1}$ and $E_{2}$ are used in series and in conjunction and the balancing length is found to be $58 \mathrm{~cm}$ of the wire. If the polarity of $E_{2}$ is reversed, then the balancing length becomes $29 \mathrm{~cm}$. The ratio $\frac{E_{1}}{E_{2}}$ of the emf of the two cells is
152511 Two cells $P$ and $Q$ each of emf $2.16 \mathrm{~V}$ are connected in series with a resistor of $19.6 \Omega$. An ideal voltmeter reads $2 \mathrm{~V}$, when connected across the cell $P$ and $1.92 \mathrm{~V}$ when connected across the cell $Q$. the ratio of the internal resistances of the cell $P$ and $Q$ is
152513
The emfs of three cells connected in parallel are
$E_{1}=5 \mathrm{~V}, E_{2}=8 \mathrm{~V}$ and $E_{3}=10 \mathrm{~V}$ and their internal resistances are $R_{1}=1 \Omega, R_{2}=2 \Omega$ and $R_{3}$ $=3 \Omega$ respectively. By changing $E_{3}$ to $E_{3 n}$, the equivalent emf is doubled, then $E_{3 N}$ in $V$ is
152514 In a potentiometer experiment two cells of emf $E_{1}$ and $E_{2}$ are used in series and in conjunction and the balancing length is found to be $58 \mathrm{~cm}$ of the wire. If the polarity of $E_{2}$ is reversed, then the balancing length becomes $29 \mathrm{~cm}$. The ratio $\frac{E_{1}}{E_{2}}$ of the emf of the two cells is
152511 Two cells $P$ and $Q$ each of emf $2.16 \mathrm{~V}$ are connected in series with a resistor of $19.6 \Omega$. An ideal voltmeter reads $2 \mathrm{~V}$, when connected across the cell $P$ and $1.92 \mathrm{~V}$ when connected across the cell $Q$. the ratio of the internal resistances of the cell $P$ and $Q$ is
152513
The emfs of three cells connected in parallel are
$E_{1}=5 \mathrm{~V}, E_{2}=8 \mathrm{~V}$ and $E_{3}=10 \mathrm{~V}$ and their internal resistances are $R_{1}=1 \Omega, R_{2}=2 \Omega$ and $R_{3}$ $=3 \Omega$ respectively. By changing $E_{3}$ to $E_{3 n}$, the equivalent emf is doubled, then $E_{3 N}$ in $V$ is
152514 In a potentiometer experiment two cells of emf $E_{1}$ and $E_{2}$ are used in series and in conjunction and the balancing length is found to be $58 \mathrm{~cm}$ of the wire. If the polarity of $E_{2}$ is reversed, then the balancing length becomes $29 \mathrm{~cm}$. The ratio $\frac{E_{1}}{E_{2}}$ of the emf of the two cells is
152511 Two cells $P$ and $Q$ each of emf $2.16 \mathrm{~V}$ are connected in series with a resistor of $19.6 \Omega$. An ideal voltmeter reads $2 \mathrm{~V}$, when connected across the cell $P$ and $1.92 \mathrm{~V}$ when connected across the cell $Q$. the ratio of the internal resistances of the cell $P$ and $Q$ is
152513
The emfs of three cells connected in parallel are
$E_{1}=5 \mathrm{~V}, E_{2}=8 \mathrm{~V}$ and $E_{3}=10 \mathrm{~V}$ and their internal resistances are $R_{1}=1 \Omega, R_{2}=2 \Omega$ and $R_{3}$ $=3 \Omega$ respectively. By changing $E_{3}$ to $E_{3 n}$, the equivalent emf is doubled, then $E_{3 N}$ in $V$ is
152514 In a potentiometer experiment two cells of emf $E_{1}$ and $E_{2}$ are used in series and in conjunction and the balancing length is found to be $58 \mathrm{~cm}$ of the wire. If the polarity of $E_{2}$ is reversed, then the balancing length becomes $29 \mathrm{~cm}$. The ratio $\frac{E_{1}}{E_{2}}$ of the emf of the two cells is