Which of the following statements are not true?

Options

A. All charges at rest tend to move from higher electric potential to lower electric potential
B. All charges at rest tend to move from lower electric potential to higher electrical potential
C. Positive charges at rest tend to move from lower electric potential to higher electric potential and negative charges at rest tend to move from higher electric potential to lower electric potential
D. Positive charges at rest tend to move from higher potential to lower potential and negative charges at rest tend to move from lower electric potential to higher potential.

Answer

To determine which statements are not true regarding the movement of charges in an electric field, we can analyze the behavior of positive and negative charges in relation to electric potential.

### Step-by-Step Solution:

1. **Understanding Electric Potential:**
- Electric potential is a measure of the potential energy per unit charge at a point in an electric field. Charges move in response to differences in electric potential.

2. **Movement of Charges:**
- **Positive Charges:** Positive charges move from regions of high potential to low potential.
- **Negative Charges (Electrons):** Negative charges move from regions of low potential to high potential.

3. **Analyzing the Statements:**
- **Statement 1:** "All charges tend to move from high to low potential."
- This statement is incorrect because while positive charges move from high to low potential, negative charges move from low to high potential.

- **Statement 2:** "Positive charges at rest tend to move from lower potential."
- This statement is also incorrect. Positive charges do not move from lower potential; they move from high potential to low potential.

- **Statement 3:** "Positive charges at rest move from low to high potential."
- This statement is incorrect, as positive charges move from high potential to low potential.

- **Statement 4:** "Positive charges at rest tend to move from high to low potential."
- This statement is correct. Positive charges do indeed move from high to low potential.

4. **Conclusion:**
- The incorrect statements are: **1, 2, and 3**. The correct statement is **4**.

### Final Answer:
The statements that are not true are **1, 2, and 3**.