Name the physical quantity which has its unit joule `"coulomb"^(-1)`. Is it a scalar or vector quantity?

Explanation

To solve the question, we need to identify the physical quantity that has the unit of joule per coulomb (J/C) and determine whether it is a scalar or vector quantity.

### Step-by-Step Solution:

1. **Understanding the Units**:
- The unit "joule" (J) is a measure of work or energy.
- The unit "coulomb" (C) is a measure of electric charge.
- Therefore, the unit joule per coulomb (J/C) represents work done per unit charge.
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