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Why are cathode rays always considered ...

Why are cathode rays always considered to be consist of fundamental common particles called electrons?

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This is because all the electrons posses same `(e )/(m )` ratio irrespective of the gas in the discharge tube or the nature of electrons . This that the cathode rays do not of gaseous charged atoms otherwise `(e )/(m )` ratio would have been for differnt for different taken .
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Knowledge Check

  • Assertion : The characteristics of cathode rays do not depend upon the material of electrodes and the nature of the gas present in the cathode ray tube. Reason : Cathode rays consist of negatively charged particles, called electrons.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • In each of the following question a statement of assertion is given followed by a corresponding statement of reason just below it of the statement mark the correct answer as Assertion(A) Cathode rays consists of negatively charged particles called electrons Reason (R) in the presence of electrical field the behaviour of cathode rays is similar to the negatively charged particles.

    A
    Both A and R are true and R is the correct explanation of A
    B
    Both A and R are true and R is not the correct explanation of A
    C
    A is true but R is false
    D
    A is false but R is true

  • During the 19th century, light was considered to be a stream of particles called

    A
    atoms
    B
    electrons
    C
    corpuscles
    D
    quantas
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