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Assertion (A), study of discharge of ele...

Assertion (A), study of discharge of electricity through gases at low pressure resulted in the discovery of cathod rays .
Reason (R ): cathod rays are deflected by both magnetic and electric fields and the direction of deflection shows that they are nagatievly charged .

A

`A` and `R` are true and `R` is the correct explaination of `A`

B

`A` and `R` are true and `R`is not the correct explaination of `A`

C

`A` is true and `R` is false.

D

`A` is false but `R` is true

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Cathode rays get deflected in an electric field towards

    A
    positive Plat
    B
    negative plate
    C
    no deflection takes place
    D
    both (b) and (c) are correct

  • Goldstein's experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of :

    A
    electron
    B
    proton
    C
    nucleus
    D
    neutron

  • In the phenomenon of electric discharge through gases at low pressure , the coloured glow in the tube appears as a result of

    A
    excitation of electrons in the atoms
    B
    collision between the atoms of the gas
    C
    collisions between the charged particles emitted from the cathode and the atoms of the gas
    D
    collisions between different electrons of the atoms of the gas

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    When electric field is applied, the cathod rays bend towards _____ .

    The study of cathode rays (i.e. electronic discharge through gases) shows that -

    Assertion: X-rays cannot be deflected by electric or magnetic fields . Reason: These are electromagnetic waves.

    When subjected to a transverse electric field, cathode rays move

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