# electric() Creates a field that attracts or repels objects based on their electrical charge and on their distance from the field’s center. ``` class func electric() -> SCNPhysicsField ``` ## Return Value A physics field object. To use the field in a scene, attach it to the [`physicsField`](/documentation/SceneKit/SCNNode/physicsField) property of an [`SCNNode`](/documentation/SceneKit/SCNNode) object. ## Discussion Use this field type to make objects behave differently from one another when they enter a region, or to make an object’s behavior different from its mass-based behavior. An electric field behaves according to the first part of the Lorentz force equation modeling real-world electromagnetic forces—the field applies a force whose magnitude is proportional to electric charge and distance. By default, physics bodies and particle systems have no electric charge, so they are unaffected by electric and magnetic fields. Use the [`charge`](/documentation/SceneKit/SCNPhysicsBody/charge) property of a physics body or the [`particleCharge`](/documentation/SceneKit/SCNParticleSystem/particleCharge) property of a particle system to add charge-based behavior. When the field’s [`strength`](/documentation/SceneKit/SCNPhysicsField/strength) value is positive (the default), it attracts bodies whose charge is negative and repels bodies whose charge is positive. To reverse this behavior, set the field’s [`strength`](/documentation/SceneKit/SCNPhysicsField/strength) property to a negative value. The default [`falloffExponent`](/documentation/SceneKit/SCNPhysicsField/falloffExponent) value for an electric field is `2.0`, indicating that the field’s effect diminishes with the square of its distance from its center. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)