Gujarat BoardEnglish MediumSTD 12 SciencePhysicsModel Paper 12 Marks
Question
Write the law of conservation of charge. Give one example.
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Answer
The total charge of the electrically isolated system is always conserved. $\rightarrow$ When bodies are charged by rubbing, there is transfer of electrons from one bod to the other; no new charges are either created or destroyed. $\rightarrow$ When we rub two bodies, what one body gains in charge the other body lose . $\rightarrow $ Within an isolated system consisting of many charged bodies, due to interactions among the bodies, charges may get redistributed but remains conserved. $\rightarrow $ It is not possible to create or destroy net charge carried by any isolated system, although the charge carrying particles may be created or destroyed in a process. $\rightarrow $ When a neutron turns into a proton and an electron the proton and electron thus created have equal and opposite charges and the total charge is zero before and after the creation. $\begin{array}{ll} & { }_0 n^1 \rightarrow{ }_1 p^1+-{ }_1 e^0 \\ \therefore & 0=+e+(-e) \end{array}$ $\rightarrow$ Conservation of charge is a universal phenomena.
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