Advertisements
Advertisements
Question
What are cathode rays? How are these rays formed?
Advertisements
Solution
Cathode rays are the beam of electrons which travel from the negatively charged end (i.e. cathode to anode) of a vacuum tube, across a voltage difference between the electrodes placed at each end.
Formation of cathode rays:
Generally gases are poor conductors of electricity. However, when a high voltage charge from an induction coil is applied to tubes filled with gases at very low pressure (0.01 mm of mercury), the gases become good conductors of electricity and begin to flow in the form of rays.
These rays are called cathode rays and they travel from the cathode towards the anode.
APPEARS IN
RELATED QUESTIONS
The subatomic particle called electron was discovered by :
An electron carries a ________ charge.
Name the sub-atomic particle whose charge is -1.
What are inert elements?
The electronic configuration of nitrogen is (2, 5). How many electrons in the outer shell of a nitrogen atom are not involved in the formation of a nitrogen molecule?
What is the relation between the number of protons and the number of electrons in an atom?
_______ is a negatively charged particle.
All non–metals will have ______ electrons in the outermost orbit of their atoms.
Helium has two electrons in the outermost orbit and so it is chemically inert.
When an atom gains an electron it has more electrons and thus it carries a positive charge.
