Statement-1: The kinetic energy of an electron is greater than α-particle having same momentum.
Statement-2: Mass of α-particle is greater than the mass of electron.

  1. A

    Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.

  2. B

    Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.

  3. C

    Statement-1 is true, statement-2 is false.

  4. D

    Statement-1 is false, statement-2 is true.

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    Solution:

    Momentum=2mKE

    Pe=Pα 2me.KEe=2mα.KEα meKE=mαKEα KEeKEα=mαme

    Mass of a particle is more than mass of electron

    thus mαme>1; this KEeKEα>1

    Thus statement-1 is true.
    Statement-2 is also true.

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