Cathode rays consist of

Protons

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Electrons

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Neutrons

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None of these

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Solution

The correct option is B
Electrons

Let's try to analyze the effect of Electric field and magnetic field on cathode rays:

Effect of electric field: When an electric field is applied to a stream of cathode rays, they get deflected towards the positive plate. It shows that cathode rays are themselves negatively charged.

Effect of magnetic field: When a magnetic field is applied perpendicular to the path of cathode rays, they get deflected in the direction expected for negative particles. This further confirms that cathode rays are negatively charged.

$\Rightarrow$ Therefore, we can conclude that cathode rays consist of electrons.

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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 fundamental particle(s) constituting the cathode rays is
(i) Proton
(ii) Electron
(iii) Neutron

Q. ___________ said that cathode rays consist of negatively charged particles and these were named as electrons.

Q. Which of the following will not slow deflection from the path on passing through an electric field?

Proton, cathode rays, electron, neutron.

Q. Cathode rays constitute a stream of
(a) electrons
(b) protons
(c) positive ions
(d) negative ions

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