Advertisements
Advertisements
प्रश्न
What are free electrons?
Advertisements
उत्तर
Electrons revolving in the outermost orbit of an atom which are weakly held by the nucleus are called free electrons
APPEARS IN
संबंधित प्रश्न
State three factors on which the rate of emission of electrons from a metal surface depends
What happens if the negative potential is changed on a grid?
When is said to be the nucleus unstable?
A radioactive nuclide `""_86^226` Ra decays by emission of two alpha particles, one beta particle and gamma rays. Which of the following is the resulting nuclide X?
State two characteristics of the substance used as thermionic emitter.
How is a cathode ray beam affected while passing through a magnetic field?
Why are materials of low work function preferred as thermionic cathode materials?
In a cathode ray tube state. How is it possible to increase the rate of emission of electrons.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
