Class 12

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Q1.

In an atom,for the electron to revolve around the nucleus,the necessary centripetal force is obtained from which of the following forces exerted by the nucleus on the electron?

(A)
Nuclear force
(B)
Gravitational force
(C)
Magnetic force
(D)
Electrostatic force
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Q2.

An alpha particle is accelerated through a potential difference of $10^6 \ V$. Its kinetic energy will be $MeV$.

(A)
$1$
(B)
$2$
(C)
$4$
(D)
$8$
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