Which one of the following units is not a unit of electrical measurement ?
- AOption (a)
Coulomb
- BOption (b)
Siemen
- COption (c)
Angstrom
- DOption (d)
Ohm
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Correct answer
Angstrom
Why this answer is correct
The correct answer is Angstrom.
Important Points
| Angstrom | - An angstrom or ångström is a unit of length used to measure very small distances. - One angstrom is equal to 10−10 m |
|---|---|
| Siemen | - The siemens, abbreviated S, is the SI unit of electrical conductance. - It is the conductance that will allow a current of one ampere across a potential drop of one volt. - The siemens is the reciprocal of the ohm. |
| Coulomb | - The coulomb, also written as its abbreviation 'C', is the SI unit for electric charge. - One coulomb is equal to the amount of charge from a current of one ampere flowing for one second. - One coulomb is equal to the charge on 6.241 x 1018 protons. The charge on 1 proton is 1.6 x 10-19 C. |
| ohm | - It is defined to be the electrical resistance between two points of a conductor when a constant potential difference applied between these points produces in this conductor a current of one ampere. - The resistance in ohms is numerically equal to the magnitude of the potential difference. |