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The ratio e//m i.e. specific , for a cat...

The ratio `e//m` i.e. specific , for a cathode ray

A

varies with a gas in a discharge tube

B

is fixed

C

varies with different electrodes

D

is maximum if hydrogen is taken

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The specific charge for a cathode ray.

    A
    Has the smallest value when the discharge tube is filled with `H_(2)`
    B
    Is constant
    C
    Varies with the atomic numbe of gas in the discharge tube
    D
    Varies with the atomic number of an element forming the cathode ray

  • The specific charge for a cathode ray.

    A
    Has the smallest value when the discharge tube is filled with `H_2`
    B
    Is constant
    C
    Varies with the atomic number of gas in the discharge tube
    D
    Varies with the atomic number of an element forming the cathode ray

  • Cathode rays are

    A
    Positive rays
    B
    netural rays
    C
    he rays
    D
    electron waves