When current passes through a conductor,

Options

A. it creates an electric firld around it, directed towards the conductor
B. it creates an electric field, directed away from the conductor
C. none of the above
D. All of these

Explanation

To solve the question "When current passes through a conductor, what is the effect on its electric field?", we need to analyze the behavior of charges within a conductor when current flows through it.

### Step-by-Step Solution:

1. **Understanding Current in a Conductor**:
- When current flows through a conductor, it means that there is a movement of charge carriers, typically electrons, within the material.

2. **Behavior of Free Electrons**:
- Conductors contain free electrons that can move easily. When a voltage is applied across the conductor, these electrons start to drift in the direction opposite to the electric field.

3. **Charge Distribution**:
- As the electrons move, they tend to redistribute themselves within the conductor. Due to the repulsion between like charges, the free electrons will move towards the surface of the conductor.

4. **Electric Field Inside the Conductor**:
- Inside a perfect conductor in electrostatic equilibrium, the electric field is zero. This is because the free electrons have moved to the surface, neutralizing any internal electric field.

5. **Conclusion on Electric Field**:
- Therefore, when current passes through a conductor, the electric field inside the conductor remains zero. This leads us to conclude that the options provided in the question do not accurately describe the situation.

6. **Final Answer**:
- The correct answer is option C: "None of the above."