The wavelength of electrons accelerated from rest through a potential difference of 40 kV is x * 10^-12m. The value of x is________. (Nearest Integer)

Given : Mass of electron = 9.1 * 10^-31kg

Charge on an electron = 1.6 * 10^-19C

Planck's constant = 6.63 * 10^-34Js

A plane electromagnetic wave EZ = 100 cos (6 × 10⁸ t + 4x) V/m, where x is in metre and t is in second. propagates in medium, what is refractive index of the medium?

The process of settling of colloidal particles is known as

Which of the following is not a characteristic of physisorption of a gas on solid surface?

Emulsion is a collodial solution of 

The coagulating power of ions for haemoglobin decreases in the order