Photoelectric EffectHard
Question
Two small drops of mercury, each of radius R coalesece to form a single large energies before and after the change is :
Options
A.1 : 21/3
B.21/3 : 1
C.2 : 1
D.1 : 2
Solution
Let r be radius of common drop
πr3 = 2 × πR3
r = (2)-/3R
Surface energy before the coalesce
= 2 × 4πR2r
Surface energy after the coalesece = 4πr2T
Ratio =
πr3 = 2 × πR3r = (2)-/3R
Surface energy before the coalesce
= 2 × 4πR2r
Surface energy after the coalesece = 4πr2T
Ratio =
Create a free account to view solution
View Solution FreeMore Photoelectric Effect Questions
The distance between a point source of light and a screen which is 60 cm is increased to 180 cm. The intensity on the sc...The mass of nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding energy per nucleon of nu...In a photoelectric experiment, the frequency and intensity of a light source are both doubled. Then consider the followi...Which of the following transitions in hydrogen atoms emit photons of highest frequency?...In old age artierise carring blood in the human body become narrow resulting in an in crease in the blood pressure. this...