The movement of colloidal particles under the influence of an electric field is called…………

Explanation

The movement of colloidal particles under the influence of an electric field is called **electrophoresis**.

### Step-by-Step Solution:

1. **Understanding Colloidal Particles**: Colloidal particles are small particles that are dispersed throughout a medium. They can be solid, liquid, or gas and are typically in the size range of 1 nm to 1 µm.

2. **Effect of Electric Field**: When an electric field is applied to a colloidal solution, the charged colloidal particles experience a force due to the electric field. This force causes the particles to move.

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