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An electron of mass 9xx10^(-31) Kg movie...

An electron of mass `9xx10^(-31)` Kg movie with a speed pf `10^(7)m//s` . It acquires a `K.E` of (in eV)

A

562.5

B

1125

C

1250

D

281.25

Text Solution

Verified by Experts

The correct Answer is:
D
`K.E.=(((1)/(2)mv^(2))/(e))`in ev where e is charge of electron
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