WB JEE 2022

The Entropy (S) of a black hole can be written as \(S = \beta {k_B}A\), where kB is the Boltzmann constant and A is the area of the black hole. The \(\beta\) has dimension of

In a Young's double slit experiment, the intensity of light at a point on the screen where the path difference between the interfering waves is \(\lambda\), (\(\lambda\) being the wavelength of light used) is I. The intensity at a point whe...

In Young's double slit experiment with a monochromatic light, maximum intensity is 4 times the minimum intensity in the interference pattern. What is the ratio of the intensities of the two interfering waves?

The kinetic energy (Ek) of a particle moving along X-axis varies with its position (X) as shown in the figure. The force acting on the particle at X = 10 m is

A particle is moving in x-y plane according to \(\overrightarrow r = b\cos \omega t\widehat i + b\sin \omega t\widehat j\), where \(\omega\) is constant. Which of the following statement(s) is/are true?