152842 A galvanometer of resistance $20 \Omega$ gives a full scale deflection when a current of $0.04 \mathrm{~A}$ is passed through it. To convert it into an ammeter of range $20 \mathrm{~A}$, the resistance that must be connected in series with the coil of the galvanometer is (Galvanometer is shunted by $0.05 \Omega$ )
152845 Two wires ' $A$ ' and ' $B$ ' of equal lengths are connected in left and right gaps, of meter bridge, respectively. The null point is obtained at $40 \mathrm{~cm}$ from left end. Diameters of the wires ' $A$ ' and ' $B$ ' are in the ratio $3: 1$, the ratio of specific of ' $A$ ' to that of ' $B$ ' is
152848 In potentiometer experiment, the balancing length with a cell $E_{1}$ of unknown e.m.f. is ' $\ell_{1}$ ' $\mathrm{cm}$. By shunting the cell with resistance $\mathrm{R} \Omega$, the balancing length becomes $\frac{\ell_{1}}{2} \mathrm{~cm}$. the internal resistance $(r)$ of a cell is
152842 A galvanometer of resistance $20 \Omega$ gives a full scale deflection when a current of $0.04 \mathrm{~A}$ is passed through it. To convert it into an ammeter of range $20 \mathrm{~A}$, the resistance that must be connected in series with the coil of the galvanometer is (Galvanometer is shunted by $0.05 \Omega$ )
152845 Two wires ' $A$ ' and ' $B$ ' of equal lengths are connected in left and right gaps, of meter bridge, respectively. The null point is obtained at $40 \mathrm{~cm}$ from left end. Diameters of the wires ' $A$ ' and ' $B$ ' are in the ratio $3: 1$, the ratio of specific of ' $A$ ' to that of ' $B$ ' is
152848 In potentiometer experiment, the balancing length with a cell $E_{1}$ of unknown e.m.f. is ' $\ell_{1}$ ' $\mathrm{cm}$. By shunting the cell with resistance $\mathrm{R} \Omega$, the balancing length becomes $\frac{\ell_{1}}{2} \mathrm{~cm}$. the internal resistance $(r)$ of a cell is
152842 A galvanometer of resistance $20 \Omega$ gives a full scale deflection when a current of $0.04 \mathrm{~A}$ is passed through it. To convert it into an ammeter of range $20 \mathrm{~A}$, the resistance that must be connected in series with the coil of the galvanometer is (Galvanometer is shunted by $0.05 \Omega$ )
152845 Two wires ' $A$ ' and ' $B$ ' of equal lengths are connected in left and right gaps, of meter bridge, respectively. The null point is obtained at $40 \mathrm{~cm}$ from left end. Diameters of the wires ' $A$ ' and ' $B$ ' are in the ratio $3: 1$, the ratio of specific of ' $A$ ' to that of ' $B$ ' is
152848 In potentiometer experiment, the balancing length with a cell $E_{1}$ of unknown e.m.f. is ' $\ell_{1}$ ' $\mathrm{cm}$. By shunting the cell with resistance $\mathrm{R} \Omega$, the balancing length becomes $\frac{\ell_{1}}{2} \mathrm{~cm}$. the internal resistance $(r)$ of a cell is
152842 A galvanometer of resistance $20 \Omega$ gives a full scale deflection when a current of $0.04 \mathrm{~A}$ is passed through it. To convert it into an ammeter of range $20 \mathrm{~A}$, the resistance that must be connected in series with the coil of the galvanometer is (Galvanometer is shunted by $0.05 \Omega$ )
152845 Two wires ' $A$ ' and ' $B$ ' of equal lengths are connected in left and right gaps, of meter bridge, respectively. The null point is obtained at $40 \mathrm{~cm}$ from left end. Diameters of the wires ' $A$ ' and ' $B$ ' are in the ratio $3: 1$, the ratio of specific of ' $A$ ' to that of ' $B$ ' is
152848 In potentiometer experiment, the balancing length with a cell $E_{1}$ of unknown e.m.f. is ' $\ell_{1}$ ' $\mathrm{cm}$. By shunting the cell with resistance $\mathrm{R} \Omega$, the balancing length becomes $\frac{\ell_{1}}{2} \mathrm{~cm}$. the internal resistance $(r)$ of a cell is