152162 If a neglegibly small current is passed through a wire of length $15 \mathrm{~m}$ and of resistance $5 \Omega$ having uniform cross-section of $6 \times 10^{-7} \mathrm{~m}^{2}$, then coefficient of resistivity of material, is

152163 A wire of resistance $4 \Omega$ is stretched to twice its original length. In the process of stretching its area of cross section gets halved. Now, the resistance of the wire is

152164 Two wires $A$ and $B$, made of same material and having their lengths in the ratio $6: 1$ are connected in series. The potential differences across the wires are $3 \mathrm{~V}$ and $2 \mathrm{~V}$ respectively. If $\mathbf{r}_{\mathrm{A}}$ and $\mathbf{r}_{\mathrm{B}}$ are the radii of $A$ and $B$ respectively, then $\frac{r_{B}}{r_{A}}$ is :

152165 The sides of a rectangular block are $2 \mathrm{~cm}, 3 \mathrm{~cm}$ and $4 \mathrm{~cm}$ the ratio of the maximum to minimum resistance between its parallel faces is:

152162 If a neglegibly small current is passed through a wire of length $15 \mathrm{~m}$ and of resistance $5 \Omega$ having uniform cross-section of $6 \times 10^{-7} \mathrm{~m}^{2}$, then coefficient of resistivity of material, is

152163 A wire of resistance $4 \Omega$ is stretched to twice its original length. In the process of stretching its area of cross section gets halved. Now, the resistance of the wire is

152164 Two wires $A$ and $B$, made of same material and having their lengths in the ratio $6: 1$ are connected in series. The potential differences across the wires are $3 \mathrm{~V}$ and $2 \mathrm{~V}$ respectively. If $\mathbf{r}_{\mathrm{A}}$ and $\mathbf{r}_{\mathrm{B}}$ are the radii of $A$ and $B$ respectively, then $\frac{r_{B}}{r_{A}}$ is :

152165 The sides of a rectangular block are $2 \mathrm{~cm}, 3 \mathrm{~cm}$ and $4 \mathrm{~cm}$ the ratio of the maximum to minimum resistance between its parallel faces is:

152162 If a neglegibly small current is passed through a wire of length $15 \mathrm{~m}$ and of resistance $5 \Omega$ having uniform cross-section of $6 \times 10^{-7} \mathrm{~m}^{2}$, then coefficient of resistivity of material, is

152163 A wire of resistance $4 \Omega$ is stretched to twice its original length. In the process of stretching its area of cross section gets halved. Now, the resistance of the wire is

152164 Two wires $A$ and $B$, made of same material and having their lengths in the ratio $6: 1$ are connected in series. The potential differences across the wires are $3 \mathrm{~V}$ and $2 \mathrm{~V}$ respectively. If $\mathbf{r}_{\mathrm{A}}$ and $\mathbf{r}_{\mathrm{B}}$ are the radii of $A$ and $B$ respectively, then $\frac{r_{B}}{r_{A}}$ is :

152165 The sides of a rectangular block are $2 \mathrm{~cm}, 3 \mathrm{~cm}$ and $4 \mathrm{~cm}$ the ratio of the maximum to minimum resistance between its parallel faces is:

152162 If a neglegibly small current is passed through a wire of length $15 \mathrm{~m}$ and of resistance $5 \Omega$ having uniform cross-section of $6 \times 10^{-7} \mathrm{~m}^{2}$, then coefficient of resistivity of material, is

152163 A wire of resistance $4 \Omega$ is stretched to twice its original length. In the process of stretching its area of cross section gets halved. Now, the resistance of the wire is

152164 Two wires $A$ and $B$, made of same material and having their lengths in the ratio $6: 1$ are connected in series. The potential differences across the wires are $3 \mathrm{~V}$ and $2 \mathrm{~V}$ respectively. If $\mathbf{r}_{\mathrm{A}}$ and $\mathbf{r}_{\mathrm{B}}$ are the radii of $A$ and $B$ respectively, then $\frac{r_{B}}{r_{A}}$ is :

152165 The sides of a rectangular block are $2 \mathrm{~cm}, 3 \mathrm{~cm}$ and $4 \mathrm{~cm}$ the ratio of the maximum to minimum resistance between its parallel faces is: