A mass m moves in a circle on a smooth horizontalplane with velocity v0 at a radius R0. The mass isattached to a string which passes through a smoothhole in the plane as shown.
The tension in the string is increased gradually andfinally m moves in a circle of radius R0/2.The finalvalue of the kinetic energy is :-
A radiation of energy E falls normally on a perfectlyreflecting surface. The momentum transferred tothe surface is (C = Velocity of light) :-
A certain metallic surface is illuminated withmonochromatic light of wavelength, l. The stoppingpotential for photo-electric current for this light is3V0. if the same surface is illuminated with light ofwavelength 2λ, the stopping potential is V0. Thethreshold wavelength for this surface for photoelectriceffect is :-
A Carnot engine, having an efficiency of n = 1/10 asheat engine, is used as a refrigerator. If the workdone on the system is 10 J, the amount of energyabsorbed from the reservoir at lower temperature is
Which logic gate is represented by the followingcombination of logic gates ?
The refracting angle of a prism is A, and refractiveindex of the material of the prism is cot(A/2). Theangle of minimum deviation is :-