Q.

(A) : e/m of Proton is constant.
(R) : e/m of Anode ray depend on the nature of the gas used in the discharge tube.

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a

Both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation of ‘A’.

b

‘A’ is true but ‘R’ is false

c

Both 'A' and 'R' are false

d

Both ‘A’ and ‘R’ are true and ‘R’ is not the correct explanation of ‘A’

answer is B.

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Detailed Solution

e/m of proton(H 1 1 ) is 1 (constant)

 e/m of Anode ray depend on the nature of the gas used in the discharge tube.

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(A) : e/m of Proton is constant.(R) : e/m of Anode ray depend on the nature of the gas used in the discharge tube.