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Mention the SI unit and value of fundamental charge. Write its smaller units. |
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Answer» Solution :Electric charge of electron is called fundamental charge. Its symbol is e and charge is negative. In the international system (SI) of units, a unit of charge is called a COULOMB and is denoted by the symbol C. One coulomb is the charge FLOWING through a WIRE in 1 s if the current is 1A (ampere). In this system, the value of the basic unit of charge is, `e = 1.602192 xx 10^(-19)` C. In general it is TAKEN as e = `1.6 xx 10^(-19)` C. There are about `6.25 xx 10^18` electrons in a charge of - 1 C. In electrostatics, smaller charges are : 1 mC (milli coulomb) = `10^(-3)` C `1 muC` (micro coulombs) `=10^(-6)` C 1nC (nano coulombs) `=10^(-9)` C |
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