Question
$1$ Coulomb $= ...........$ Electro Static Unit.
✓
Answer
$1$ Coulomb means $3 \times 10^9$ Electro Static Unit of charge. Coulomb and $\text{ESU}$ are two different units of charge and their conversion formula is necessary. Coulomb is the unit of charge in the $SI$ system and esu is the unit of charge in the $\text{CGS}$ system.
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