Class 9 Exam > Class 9 Questions > The e/m is not constant for :-a)Cathode raysb...
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The e/m is not constant for :-
- a)Cathode rays
- b)Positive rays
- c)α - rays
- d)β - rays
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The e/m is not constant for :-a)Cathode raysb)Positive raysc)α -...
Cathode rays are beam of electrons which are negatively charged. These electrons are identical. Hence, the charge to mass ratio (e/m) of cathode rays is same for all the gases.
Whereas, in case of anode rays, they are positively charged. Also, they are composed of ionised nuclei which vary from gas to gas in terms of atomic number and mass number. Thus, charge to mass ratio (e/m) of the positively charged ions changes as the number of nucleons changes in the nucleus of each gas can be different.
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The e/m is not constant for :-a)Cathode raysb)Positive raysc)α -...
The e/m (charge to mass ratio) is not constant for cathode rays, positive rays, and any other charged particles. The e/m value depends on the nature of the particle and its velocity. For example, cathode rays are negatively charged particles (electrons) and their e/m value is constant, but positive rays are positively charged particles (such as protons) and their e/m value is different from that of electrons. Similarly, for any other charged particles, the e/m value will vary depending on their charge and mass.
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The e/m is not constant for :-a)Cathode raysb)Positive raysc)α -...
Positive rays
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The e/m is not constant for :-a)Cathode raysb)Positive raysc)α -raysd)β -raysCorrect answer is option 'C'. Can you explain this answer?
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