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Neutrons and protons are thought of as b...

Neutrons and protons are thought of as being made of a fundamental particle called

A

Positrons

B

Electrons

C

Quarks

D

Neutrino

Text Solution

Verified by Experts

The correct Answer is:
C
Quarks
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The neutron is a particle with zero charge still it has a non-zero magnetic moment with z-component 9.66 xx 10^(-27) A-m^(2) . This can be explained by the internal structure of the neutron. The evidence indicates that a neutron is composed of three fundamental particles calleed quarks : an "up" (u) quark, of charge + (2e)/(3) , and two "down" (d) quarks, each of change - (e)/(3) . The combinations of the three quarks prodcues a net charge of (2e)/(3) - e/3 - e/3 = 0 . If the quarks are in motion they can produce a non-zero magnetic moment. As a very simple model, suppose the u quark moves in a counter clockwise circular path and the d quarks move in a clockwise circular path, all of the radius r and all with the same speed v see figure. The current due to the circular motion of the u quark :-

The neutron is a particle with zero charge still it has a non-zero magnetic moment with z-component 9.66 xx 10^(-27) A-m^(2) . This can be explained by the internal structure of the neutron. The evidence indicates that a neutron is composed of three fundamental particles calleed quarks : an "up" (u) quark, of charge + (2e)/(3) , and two "down" (d) quarks, each of change - (e)/(3) . The combinations of the three quarks prodcues a net charge of (2e)/(3) - e/3 - e/3 = 0 . If the quarks are in motion they can produce a non-zero magnetic moment. As a very simple model, suppose the u quark moves in a counter clockwise circular path and the d quarks move in a clockwise circular path, all of the radius r and all with the same speed v see figure. Determine the magnitude of the magnetic moment due of the circular u quark :-

The neutron is a particle with zero charge still it has a non-zero magnetic moment with z-component 9.66 xx 10^(-27) A-m^(2) . This can be explained by the internal structure of the neutron. The evidence indicates that a neutron is composed of three fundamental particles calleed quarks : an "up" (u) quark, of charge + (2e)/(3) , and two "down" (d) quarks, each of change - (e)/(3) . The combinations of the three quarks prodcues a net charge of (2e)/(3) - e/3 - e/3 = 0 . If the quarks are in motion they can produce a non-zero magnetic moment. As a very simple model, suppose the u quark moves in a counter clockwise circular path and the d quarks move in a clockwise circular path, all of the radius r and all with the same speed v see figure. Determine the magnitude of the three-quark system :-

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