Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion The mass of \[\frac{8}{3}V\]-particles when they are emitted is higher than the mass of electrons obtained by other means. Reason \[l\]-particle and electron, both are similar panicles.A) if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
B) if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
C) if Assertion is true but Reason is false
D) if Assertion and Reason are false
Correct Answer: B
Solution :
\[\beta \] -particles are emitted with very high velocity (up to 0.99 c). So, according to Einsteins theory of relativity, the mass of a \[\beta \] -particle is much higher compared to its rest mass \[({{m}_{0}})\]. The velocity of electrons obtained by other means is very small compared to c (velocity of light). So, its mass remains nearly \[{{m}_{0}}\] But \[\beta \] -particle and electron both are similar particles.
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