which of the following jj. thomson cathode ray experiment

Anode is connected to the positive terminal and the cathode is connected to the negative terminal of the high voltage supply source. A very high potential is applied across anode and cathode by using the induction coil. A side tube P is used to pump out the enclosed gas so as to obtain the desired low pressure. It is fitted with two metal electrodes named as anode A and cathode C. It is a closed tube of length about 30 cm and diameter of about 4 cm. J.J.Thomson used a glass tube called as discharge tube. J.J.Thomson used the experimental results for defining the various properties of electrons, cathode rays. Thomson had performed discharge tube experiment in a laboratory by subjecting the electric and the magnetic fields on the cathode rays. Atoms of an element combine in a simple whole-number ratio to form molecules.Atoms of the same element are alike in all respect but they differ from the atoms of the different elements.Atoms can neither be created nor be destroyed.Matter consists of tiny indivisible particles called Atoms.ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.Introduction to J.J.Thomson cathode ray experiment The above statements are called the Postulates of Dalton’s Atomic Theory. But, later these postulates were proved wrong as the first indication of sub-atomic particles came due to the study of static electricity by Faraday which says that the flow of electricity is caused by due to the charged particles. Thomson first proved the existence of negatively charged particles within an atom called electrons.

Thus, the electron is the first sub-atomic particle to be discovered and this paved the way for the discovery of all other sub-atomic particles (i.e.

proton and neutron) and also the actual structure of the atom. In this article, we will discuss the discovery of electrons using the Cathode ray tube by William Crooke and later the actual discovery of electrons by J.J. Thomson, a scientist, began working with cathode ray tubes in the early 1900s. Cathode ray tubes are vacuum-sealed glass tubes that have had most of the air removed. At one end of the tube, a high voltage is placed between two electrodes, causing a stream of particles to flow from the cathode (the negatively charged electrode) to the anode (the positively charged electrode) (the positively charged electrode).īecause the particle beam, or cathode ray, starts at the cathode, the tubes are termed cathode ray tubes.

The beam may be detected by painting phosphors on the tube’s far end, beyond the anode. When the cathode ray strikes the phosphors, they spark or emit light. Thomson surrounded the cathode ray with two oppositely charged electric plates to investigate the particles’ characteristics. The cathode ray was redirected from the negatively charged electric plate to the positively charged plate. The cathode ray was made up of negatively charged particles, according to this. Thomson also installed two magnets on either side of the tube and noticed that the cathode ray was diverted by the magnetic field. Thomson used the findings of these tests to calculate the mass-to-charge ratio of cathode ray particles, which led to a surprising discovery: each particle’s mass was much, much lower than any known atom.

Which of the following jj. thomson cathode ray experiment