- (A) It does emit radiation
- (B) Its size as compare to proton and neutron is very small
- (C) No antiparticle of electron is present
- (D) The velocity of electron must be very high according to uncertainty principle
Physics Mcqs
- (A) Line spectrum of atoms
- (B) Production of x-rays.
- (C) Diffraction by crystalline solids
- (D) Photoelectric effect
- (A) Heating the filament
- (B) Electron excitation in the gas
- (C) Ionization of atoms
- (D) All the above
- (A) The ions in a crystal are well arranged
- (B) The lines in a diffraction grating cannot reflect X-rays.
- (C) The penetration power of X-rays is high in a diffraction grating
- (D) The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal
- (A) Number of incident electron i.e. filament current
- (B) The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated
- (C) The soft target which can easily emit electrons
- (D) All of above are correct
- (A) 6.2 x 10-10m
- (B) 9.1 x 10-18m
- (C) 3.11 x 10-10m
- (D) 4 x 10-10m
- (A) protons
- (B) positrons
- (C) electrons
- (D) photons
- (A) insulator
- (B) conductor
- (C) semi conductor
- (D) any of above
- (A) constant
- (B) zero
- (C) changing
- (D) infinite
- (A) holes in n-type and free electrons in p-type
- (B) holes in n-type and p-type
- (C) free electrons in n-type and holes in p-type
- (D) free electrons in n-type and p-type
