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Explain the meaning of the statement ' electric charge of a body is quantised' Why can one ignore quantisation of electric charge when dealing with macroscopici.e., large scale charges ? |
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Answer» Solution :The statement . electric charge of a body is quantised, means that the charge on the body must be an integer MULTIPLE of some elementary charge. Experimentallythis elementarycharge is found to be equal to the charge on an electron or a proton and its VALUE is `e= 1.602 XX 10 ^(-19)C .` Thus according to quantisation concept charges on a body ` q= +- NE ,` where n = 0,1,2,3, .... Aselementaryunit of charges e has a value ` 1. 60 xx 10 ^(-19)C,` hence for macroscopic charges of the order of micro coulomb `(1 mu C = 6.25 xx 10 ^(12)` times the value of an ELECTRONIC charge)or more we can ignore the quantisation of charges and may consider charge as a continuous charges. |
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