Define the current sensitivity of a galvanometer. Write its SI unit.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Galvanometer:**
- A galvanometer is an instrument used to detect and measure small electric currents. It consists of a coil of wire that is suspended in a magnetic field.

2. **Deflection of the Galvanometer:**
- When an electric current passes through the coil of the galvanometer, it experiences a torque due to the magnetic field, causing the needle to deflect from its rest position. The angle of this deflection is denoted as θ (theta).

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