Which of the following is not the unit of charge ?

Options

A. farad
B. coulomb
C. stat coulomb
D. faraday

Answer

To determine which of the following is not a unit of charge, we will analyze each option provided:

1. **Coulomb (C)**: This is the SI unit of electric charge. It is defined as the amount of charge transported by a constant current of one ampere in one second. Therefore, Coulomb is a unit of charge.

2. **Farad (F)**: This is the SI unit of capacitance, not charge. Capacitance is the ability of a system to store charge per unit voltage. Therefore, Farad is not a unit of charge.

3. **Sat Coulomb (statC)**: This is a unit of charge in the CGS (centimeter-gram-second) system of units. It is equivalent to a specific amount of charge, so it is indeed a unit of charge.

4. **Faraday (F)**: This is a unit of electric charge that is equal to the charge of one mole of electrons, approximately 96485 coulombs. Therefore, Faraday is also a unit of charge.

Based on this analysis, the option that is not a unit of charge is **Farad**.

### Final Answer:
**Farad** is not a unit of charge.

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