Physics

From Ampere's circuital law for a long straight wire of circular cross-section carrying a steady current, the variation of magnetic field in the inside and outside region of the wire:

A nucleus of mass number 189 splits into two nuclei having mass number 125 and 64 . The ratio of radius of two daughter nuclei respectively is :

If E and G respectively denotes energy and gravitational constant, then E/G has the dimensions of:

Two charged spherical conductors of radius R₁ and R₂ are connected by a wire. Then the ratio of surface charge densities of the spheres (σ₁/σ₂) is:

A thick current carrying cable of radius ' R' carries current ' I ' uniformly distributed across its cross-section. The variation of magnetic-field B(r) due to the cable with the distance 'r' from the axis of the cable is represented by:

A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented nuclei is 7.6MeV while that of fragments is 8.5MeV. The total gain in the Binding Energy in the process is:

A nucleus of mass number 189 splits into two nuclei having mass number 125 and 64 . The ratio of radius of two daughter nuclei respectively is :

The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.

Water falls from a height of $\frac{1}{3}{\mathrm{n}\mathrm{m}\mathrm{v}}^{-2}$ at the rate of $\sqrt[]{\frac{3\mathrm{R}\mathrm{T}}{\mathrm{M}}}$ to operate a turbine. The losses due to frictional force are $\frac{5}{2}\mathrm{R}\mathrm{T}$ of the input energy. How-much power is generated by the turbine? $\frac{3}{2}{\mathrm{k}}_{\mathrm{B}}\mathrm{T}$  )