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    				| 1. | As water is made of atoms having protons (charge +e) and electrons (charge 2:e), does the water flowing through pipe carry an electric current? Explain. | 
| Answer» Answer: The net charge on proton is +e. This can be OBTAINED by p=(32+32−31)e=+e Hence, proton has two 'up' quark and a 'down quark'. The net charge on neutron is 0. This can be obtained by N=(32−31−31)=0 Hence, neutron has ONE 'up' quark and two 'down' quarks. | |