The movement of colloidal particle under applied electric current is known as:

Options

A. Electrodialysis
B. Dialysis
C. Electrophoresis
D. None of the above

Explanation

To solve the question regarding the movement of colloidal particles under applied electric current, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept**: We need to identify the term that describes the movement of colloidal particles when an electric current is applied. This phenomenon is related to the behavior of charged particles in an electric field.

2. **Identify the Correct Term**: The movement of colloidal particles under the influence of an electric field is specifically termed as "Electrophoresis." In this process, colloidal particles migrate towards the electrode of opposite charge when an electric current is applied.

3. **Differentiate from Other Processes**: It's important to distinguish electrophoresis from other related processes. For instance, dialysis is a separation technique that does not involve the movement of particles under an electric field. Instead, it separates colloidal particles from smaller ions or molecules using a semi-permeable membrane.

4. **Conclusion**: Based on the understanding of these terms, we can conclude that the correct answer to the question is "Electrophoresis."

### Final Answer:
The movement of colloidal particles under applied electric current is known as **Electrophoresis**.

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