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Q.

An electron moves in a circular orbit at a distance from a proton with kinetic energy E. To escape to infinity, the minimum energy which must be supplied to the electron is

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a

2E

b

E2

c

0.5E

d

E

answer is A.

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Detailed Solution

If kinetic energy is E, then total energy will be - E, i.e. energy E must be supplied to the electron to escape to infinity.

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