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
Fill in the blanks of the following statements :
An atom has atomic mass number 23 and atomic number 11. The atom has_________ electrons.
Cathode rays are a beam of fast moving _________
The maximum number of electrons that can be accommodated in L shell are_________
The maximum number of electrons that can go into the M shell is _________
What is an electron? State its relative mass and charge.
How does an electron differ from a neutron?
The subatomic particle called electron was discovered by :
Write down the number of electrons in X and neutrons in Y.
What are inert elements?
The electronic configuration of fluoride ion is the same as that of the neon atom. What is the difference between the two?
If electrons are getting added to en element Y; then
Is Y getting oxidized or reduced?
The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element?
Helium has two electrons in the outermost orbit and so it is chemically inert.
