151710 Two isolated metallic solid spheres of radii $R$ and $2 \mathrm{R}$ are charged such that both have same charge density $\sigma$. The spheres are then connected by a thin conducting wire. If the new charge density of the bigger sphere is $\sigma^{\prime}$. The ratio $\frac{\sigma^{\prime}}{\sigma}$ is

151711 The charge flowing in a conductor changes with time as $Q(t)=\alpha t-\beta t^{2}+\gamma t^{3}$. Where $\alpha, \beta$ and $\gamma$ are constants. Minimum value of current is:

151712 The ratio of average electric energy density and total average energy density of electromagnetic wave is :

151717 Ten identical cell each of potential ' $E$ ' and internal resistance ' $r$ ', are connected in series to form a closed circuit. An ideal voltmeter connected across three cells, will read

151718 A charged particle is moving in an electric field of $3 \times 10^{-10} \mathrm{Vm}^{-1}$ with mobility $2.5 \times 10^{6} \mathrm{~m}^{2} / \mathrm{V} / \mathrm{s}$, its drift velocity is

151710 Two isolated metallic solid spheres of radii $R$ and $2 \mathrm{R}$ are charged such that both have same charge density $\sigma$. The spheres are then connected by a thin conducting wire. If the new charge density of the bigger sphere is $\sigma^{\prime}$. The ratio $\frac{\sigma^{\prime}}{\sigma}$ is

151711 The charge flowing in a conductor changes with time as $Q(t)=\alpha t-\beta t^{2}+\gamma t^{3}$. Where $\alpha, \beta$ and $\gamma$ are constants. Minimum value of current is:

151712 The ratio of average electric energy density and total average energy density of electromagnetic wave is :

151717 Ten identical cell each of potential ' $E$ ' and internal resistance ' $r$ ', are connected in series to form a closed circuit. An ideal voltmeter connected across three cells, will read

151718 A charged particle is moving in an electric field of $3 \times 10^{-10} \mathrm{Vm}^{-1}$ with mobility $2.5 \times 10^{6} \mathrm{~m}^{2} / \mathrm{V} / \mathrm{s}$, its drift velocity is

151710 Two isolated metallic solid spheres of radii $R$ and $2 \mathrm{R}$ are charged such that both have same charge density $\sigma$. The spheres are then connected by a thin conducting wire. If the new charge density of the bigger sphere is $\sigma^{\prime}$. The ratio $\frac{\sigma^{\prime}}{\sigma}$ is

151711 The charge flowing in a conductor changes with time as $Q(t)=\alpha t-\beta t^{2}+\gamma t^{3}$. Where $\alpha, \beta$ and $\gamma$ are constants. Minimum value of current is:

151712 The ratio of average electric energy density and total average energy density of electromagnetic wave is :

151717 Ten identical cell each of potential ' $E$ ' and internal resistance ' $r$ ', are connected in series to form a closed circuit. An ideal voltmeter connected across three cells, will read

151718 A charged particle is moving in an electric field of $3 \times 10^{-10} \mathrm{Vm}^{-1}$ with mobility $2.5 \times 10^{6} \mathrm{~m}^{2} / \mathrm{V} / \mathrm{s}$, its drift velocity is

151710 Two isolated metallic solid spheres of radii $R$ and $2 \mathrm{R}$ are charged such that both have same charge density $\sigma$. The spheres are then connected by a thin conducting wire. If the new charge density of the bigger sphere is $\sigma^{\prime}$. The ratio $\frac{\sigma^{\prime}}{\sigma}$ is

151711 The charge flowing in a conductor changes with time as $Q(t)=\alpha t-\beta t^{2}+\gamma t^{3}$. Where $\alpha, \beta$ and $\gamma$ are constants. Minimum value of current is:

151712 The ratio of average electric energy density and total average energy density of electromagnetic wave is :

151717 Ten identical cell each of potential ' $E$ ' and internal resistance ' $r$ ', are connected in series to form a closed circuit. An ideal voltmeter connected across three cells, will read

151718 A charged particle is moving in an electric field of $3 \times 10^{-10} \mathrm{Vm}^{-1}$ with mobility $2.5 \times 10^{6} \mathrm{~m}^{2} / \mathrm{V} / \mathrm{s}$, its drift velocity is

151710 Two isolated metallic solid spheres of radii $R$ and $2 \mathrm{R}$ are charged such that both have same charge density $\sigma$. The spheres are then connected by a thin conducting wire. If the new charge density of the bigger sphere is $\sigma^{\prime}$. The ratio $\frac{\sigma^{\prime}}{\sigma}$ is

151711 The charge flowing in a conductor changes with time as $Q(t)=\alpha t-\beta t^{2}+\gamma t^{3}$. Where $\alpha, \beta$ and $\gamma$ are constants. Minimum value of current is:

151712 The ratio of average electric energy density and total average energy density of electromagnetic wave is :

151717 Ten identical cell each of potential ' $E$ ' and internal resistance ' $r$ ', are connected in series to form a closed circuit. An ideal voltmeter connected across three cells, will read

151718 A charged particle is moving in an electric field of $3 \times 10^{-10} \mathrm{Vm}^{-1}$ with mobility $2.5 \times 10^{6} \mathrm{~m}^{2} / \mathrm{V} / \mathrm{s}$, its drift velocity is