Assertion: specific charge of positive rays is not constant. Reason: mass of ions varies with speed.

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12.Atoms

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Assertion: The specific charge of positive rays is not constant.
Reason: The mass of ions varies with speed.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

(AIIMS-1999)

Solution

The specific charge $\frac{e}{m}$ of positive ray is not constant because for different velocities the rest mass of particles change i.e. mass of ions varies with speed. So $\frac{e}{m}$ will differ. Hence, Reason and Assertion both are correct and Reason explains Assertion

Standard 12

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Assertion: The specific charge of positive rays is not constant. Reason: The mass of ions varies with speed.

Solution

Similar Questions

If in nature there may not be an element for which the principal quantum number $n > 4,$ then the total possible number of elements will be

An alpha nucleus of energy $\frac{1}{2}mv^2$ bombards a heavy nuclear target of charge $Ze.$ Then the distance of closest approach for the alpha nucleus will be proportional to

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Assertion: The specific charge of positive rays is not constant.
Reason: The mass of ions varies with speed.