If equipotential lines are close together, what does it indicate?

If equipotential lines are close together, what does it indicate?

• A. The potential is increasing
• B. The strength of the electric field is strong
• C. The charge is zero
• D. The distance between charges is large

Answer: (B)

Equipotential lines mark places where the electric potential is the same. The electric field is the negative gradient of the potential, so its strength depends on how quickly the potential changes as you move through space. When equipotential lines are close together, the potential changes a lot over a short distance, meaning the gradient is large and the electric field is strong. If the lines are spaced far apart, the potential changes more gradually and the field is weaker. This effect describes the local field strength, not the direction of the field or whether there’s a net charge in the region. So the close spacing of equipotential lines indicates a strong electric field.

Equipotential lines mark places where the electric potential is the same. The electric field is the negative gradient of the potential, so its strength depends on how quickly the potential changes as you move through space. When equipotential lines are close together, the potential changes a lot over a short distance, meaning the gradient is large and the electric field is strong. If the lines are spaced far apart, the potential changes more gradually and the field is weaker. This effect describes the local field strength, not the direction of the field or whether there’s a net charge in the region. So the close spacing of equipotential lines indicates a strong electric field.