McqMate
| Q. |
The S.I. unit of electric charge is – |
| A. | ampere |
| B. | coulomb |
| C. | e.s.u |
| D. | Kelvin |
| Answer» B. coulomb | |
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Explanation: The SI unit of quantity of electric charge is the coulomb, which is equivalent to about 6.242x10^18 e (e is the charge of a proton). Hence, the charge of an electron is approximately -1.602x10^-19 C. The coulomb is defined as the quantity of charge that has passed through the cross section of an electrical conductor canying one ampere within one second. |
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