There is no flow of current between two charged bodies when connected because

Options

A. they have the same quantity of charge
B. they have the same potential
C. they have the same capacity
D. they have the same ratio of potential per unit charge

Explanation

To solve the question "There is no flow of current between two charged bodies when connected because," we need to analyze the options provided and understand the concept of electric potential and current flow.

### Step-by-Step Solution:

1. **Understanding Current Flow**:
- Current flows when there is a potential difference (voltage) between two points. This means that electrons will move from a region of higher potential to a region of lower potential.

**Hint**: Remember that current is driven by the difference in electric potential.

2. **Analyzing the Options**:
- **Option 1**: They have the same quantity of charge.
- This is not necessarily true. Two bodies can have the same charge but still have different potentials. Therefore, this option does not explain why current does not flow.

**Hint**: Quantity of charge alone does not determine current flow.

- **Option 2**: They have the same potential.
- If both bodies have the same electric potential, then the potential difference between them is zero. Since current requires a potential difference to flow, no current will flow in this case.

**Hint**: Current requires a difference in potential to flow.

- **Option 3**: They have the same capacity.
- The capacity of a body refers to its ability to hold charge, but it does not directly relate to whether current will flow. Therefore, this option is not correct.

**Hint**: Capacity does not influence the flow of current directly.

- **Option 4**: They have the same ratio of potential per unit charge.
- This option is more complex and does not directly address the reason for no current flow. It is not a standard explanation for current flow.

**Hint**: Focus on the concept of potential difference rather than ratios.

3. **Conclusion**:
- The correct answer is **Option 2**: They have the same potential. When two charged bodies are connected and have the same potential, there is no potential difference, and thus, no current will flow between them.

### Final Answer:
There is no flow of current between two charged bodies when connected because they have the same potential.