The dimensions of 'resistance' are same as those of _____ where h is the Planck's constant, e is the charge.

The efficiency of Carnot's heat engine is 0.5 when the temperature of the source is T₁ and that of sink is T₂. The efficiency of another Carnot's heat engine is also 0.5. The temperature of source and sink of the second engine are respectively _____.

The equation of a simple harmonic wave is given by y = 6Sin 2p(2t - 0.1x), where x and y are in mm and t is in seconds. The phase difference between two particles 2 mm apart at any instant is

The focal length of a plano convex lens is 'f' and its refractive index is 1.5. It is kept over a plane glass plate with its curved surface touching the glass plate. The gap between the lens and the glass plate is filled by a liquid. As a result, the effective focal length of the combination becomes 2f. Then the refractive index of the liquid is ______.

The forbidden energy gap in Ge is 0.72 eV. Given, hc = 12400 eV - . The maximum wavelength of radiation that will generate an electron hole pair is ______.

The magnetic field at the centre of a circular current carrying conductor of radius r is B_c. The magnetic field on its axis at a distance r from the centre is B_a. The value of B_c : B_a will be

The masses of two radioactive substances are same and their half lives are 1 year and 2 years respectively. The ratio of their activities after 6 years will be

The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon

The maximum number of possible interference maxima when slit separation is equal to 4 times the wavelength of light used in a double slit experiment is

The most stable particle in Baryon group is