The rate constant of the reaction at temperature 200K is 10 times than the rate constant at 400K.The activation energy of the reaction is

In a p-n junction the depletion region is 400nm wide and electric field of 5x10⁵Vm^-1 exists in it. The minimum energy of a conduction electron, which can diffuse from n-side to the p-side is

200MeV energy is released when one nucleus of ²³⁵U undergoes fission. The number of fissions per second required for producing a power of 1 megawatt

In an experiment of photoelectric emission, for incident light of 4000A⁰, stopping potential is 2V. If the wavelength of incident light is made 3000A⁰, then the stopping potential will be