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Question

In a quark model of elementary particles, a neutron is made of one up quark of charge 23ε and two down quark of charges (13e) . if they have a triangle configuration with a side length of the order of 1015 m. the electrostatic potential energy of the neutron is MeV is:

A
7.68
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B
-5.21
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C
-0.48
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D
9.34
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Solution

The correct option is C -0.48
Quark model of element particles, a neutron is made of one up quark of charge 23ε the two down quark at charge (13e).
We know,
Protons, neutrons are each composed of three quarks triangle configuration with side length of the order of =1015m.
electronic potential energy =12mV2

=12lq2

=12×23×(13×2)×1015
=29×1015

=0.48

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