electric field

Thân thiện

An electron moves through an electric field created by two charged plates.

Definition

1. Noun:
   • A region of space around a charged particle or object within which a force would be exerted on other charged particles or objects. An electric field is a vector field that describes the electric force per unit charge. It is an invisible influence created by electric charge.

Usage

• The concept of an "electric field" is used to explain how electric forces act at a distance without physical contact.
• It is a fundamental concept in physics, particularly in electromagnetism.
• The strength and direction of an electric field are represented by electric field lines.

Examples

• Noun:
  • The electric field around a proton points radially inward.
  • A strong electric field can ionize air molecules.
  • The formula E = F/q defines the electric field strength.

Advanced Usage

• "Electric field lines": Imaginary lines used to visualize the direction and strength of an electric field; the lines point in the direction a positive test charge would move.
  • Electric field lines never cross each other.
• "Uniform electric field": An electric field that has the same strength and direction at every point.
  • The region between two large, parallel charged plates often creates a nearly uniform electric field.
• "Electric field strength" (E): A quantitative measure of the force per unit charge, measured in volts per meter (V/m) or newtons per coulomb (N/C).
  • Calculating the electric field strength is essential for designing capacitors.

Variants and Related Words

• Electrostatic field: A special case of an electric field produced by stationary (static) charges.
  • The electrostatic field of a balloon rubbed on hair can attract small pieces of paper.
• Field: A more general term for a region of space under the influence of some force (e.g., gravitational field, magnetic field).

Synonyms

• Force field (electrical): A less precise but sometimes used synonym emphasizing the field's role in exerting force.
• E-field: A common abbreviation in physics and engineering contexts.

Related Phrases

• "To be in an electric field": To be located within the region of influence of electric charges.
  • Any charged particle placed in an electric field will experience a force.
• "To generate/create an electric field": To produce an electric field, typically by separating charges.
  • A battery generates an electric field in a connected wire.

Related Idioms

Học thuật

Noun

1. a field of force surrounding a charged particle