Question

0.3
The e/m ratio for cathode rays -
(A) Is constant
(B) Varies as the atomic number of the element
forming cathode in the discharge tube
changes
(C) Varies as atomic number of the gas in the
discharge tube varies
(D) Has the smallest value when the discharge
tube is filled with hydrogen​

Answer 1

The correct answer is C. Varies as atomic number of the gas in the discharge tube varies.

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