Electric fields 22.1
- Created by: theninjaemu
- Created on: 16-11-17 14:01
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- Electric Fields 22.1
- Electric field strength
- The force experienced per unit positive charge at that point
- E=F/Q, where F is the force experienced by the positive charge Q. The SI unit is N/C and electric field strength is a vector quantity
- Field patterns
- Mapped using lines of force
- The direction of a field at a point shows the direction of the force experienced by a small positive charge at that point
- The field strength is indicated by the separation between the field lines
- Key points
- A uniform electric field has equally spaced field lines. the electric field between 2 oppositely charged parallel plates is uniform
- Electric field lines are always perpendicular to the surface of a conductor
- A radial field has straight field lines that converge to a point at the centre of the charged object. The filed strength decreases with an increase in distance from the object
- A uniformly charged sphere can be modelled as a point charge at its centre
- Electric field strength
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