Two conductors when connected by a wire, charge flows if they have

Options

A. different charges
B. different potenials
C. different capacities
D. different charge densities

Answer

To solve the question, "Two conductors when connected by a wire, charge flows if they have," we need to analyze the conditions under which charge will flow between two conductors.

### Step-by-Step Solution:

1. **Understanding Charge Flow**:
- Charge flows between two conductors when there is a difference in electric potential (voltage) between them. This is because charge movement is driven by the electric field created by the potential difference.

2. **Identifying the Conditions**:
- When two conductors are connected by a wire, charge will flow if there is a potential difference. If both conductors have the same potential, there will be no electric field to drive the charge flow.

3. **Evaluating the Options**:
- **Different Charges**: While different charges may exist on the conductors, they do not necessarily cause charge flow unless there is a potential difference.
- **Different Potentials**: This is the correct condition for charge flow. A potential difference creates an electric field, which causes charge to move.
- **Different Capacities**: The capacitance of the conductors does not directly influence whether charge will flow; it is the potential difference that matters.
- **Different Charge Densities**: Similar to different charges, different charge densities alone do not cause charge flow without a potential difference.

4. **Conclusion**:
- The correct answer to the question is that charge flows when there is a **difference in potential** between the two conductors.

### Final Answer:
Charge flows between two conductors when they have **different potentials**.

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