Question

# A proton is fired from very far away towards a nucleus with charge Q = 120 e, where e is the electronic charge. It makes a closest approach of 10 fm to the nucleus. The de Broglie wavelength (in units of fm) of the proton at its start is : (take the proton mass, and )

A
B
C
D
Hard
Solution
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Correct option is A)

## Given here, ( charge on proton) It is based on conservation of energy of proton.Also, we know, de’broglie wavelength,Thus,Option A is correct.

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