The charge to mass ratio for the particles of the cathode rays obtained from different gases was found to be the same while the charge to mass ratio for the particle. Of the anode ray obtained from different gases was found to be different.why?

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Solution

In cathode ray , the electrons are responsible ... They have constant charge of -1 .

While ,
In anode rays , the cations (+ive gaseous atoms) are responsible . They can be +1 , +2 etc ... So charge is not constant . hence e/m ration is not constant .

A gas may get +1 with given voltage , while it will get +2 if we increase the voltage a bit .... Hence e/m ratio is not constant .. It is here depending on voltage !

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Similar questions

State whether the following statements are true or false:
(a) Thomson proposed that the nucleus of an atom contains protons and neutrons.
(b) The cathode rays obtained from all the gases consist of negetively charged particles called electrons.
(c) The anode rays obtained from all the gases consist of positively charged particles called protons.

Q. The e/m ratio of anode rays is same for different gases in discharge tube.

Charge to the Mass ratio of ___ rays varies for different gasses whereas is ___ for ___ rays.

Q. The

e / m

ratio of cathode rays is different for different gases. (True/False)

(a) What are cathode rays? What is the nature of charge on cathode rays?

(b) Explain how, cathode rays are formed from the gas taken in the discharge tube.

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