BRAINCAKEPoint Charges
A point charge is a hypothetical object of negligible size. A 'test' charge is a point charge that does not affect the field it is in i.e. does not itself produce a force.
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Key terms in this lesson
- equipotential
- A line or surface joining points of equal potential, along which no work is done moving a test mass or charge.
- electric field
- A region of space in which a charged object experiences a force due to the presence of another charge.
- electric field strength
- The force per unit charge on a small, positive test charge placed at a point in an electric field.
More in Electric Fields
- Van de Graaf generator
- Electric Potential
- Equipotentials
- Potential gradient
- The Force between Two Charged Objects
- Coulombs Law
- Electric Field Strength
- Electric Potential
All 17 lessons in Electric Fields · All OCR A-level Physics topics