Q. J. J. Thomson’s cathode ray tube experiment demonstrated that
A) Cathode rays are streams of negatively charged ions
B) All the mass of an atom is essentially in the nucleus
C) The e/m of electrons is much greater than the e/m of protons
D) The e/m ratio of the cathode ray particles changes when a different gas is placed in the discharge tube
Explanation
(c) According to J. J. Thomson’s cathode ray tube experiment the $e/m$ of electrons is much greater than the$e/m$ of protons.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.