Fichas
Electric fields
Fichas del conjunto (19)
- 1What creates electric fields?Charges
- 2What does a positive charge's field lines look like?
- 3What does a negative charge's field lines look like?
- 4What does the direction of the electric field represent?The direction in which a + charge would move if placed in field
- 5Similarities of Gravitational Field and Electric fieldBoth regions in which objects experience a force
- 6Differences of Gravitational Field and Electric FieldGravitational - Any experiences a force, only attraction
Electric - Charge object experiences a force, attraction and repulsion - 7What is permittivity?Ability of medium to allow electric fields.
- 8Ɛo?Measure of permittivity in vacuum
- 9What is relative permittivity?Permittivity relative to Ɛo
- 10Relative permittivity equation
- 11Motion of particles in uniform electric fieldThe particle has two forces acting on it; Weight and qE (Elementary charge x Electric field strength)
- 12What charge is test charge?Always positive
- 13What is electric potential?Work done in bringing a unit charge from infinity to a point [V]
- 14What is electric potential always seeking? And what is the electric potential at infinity?0 potential
- 15What is electric potential energy?Energy needed to bring charges closer together to a seperation of r
- 16What do you do to find electric potential of a point in between charges?Potential to each point summed
- 17How do you find electric potential difference?Difference in the potentials
- 18How to find the capacitance of a SPHERE?Derive from >
to get
C = 4πƐor
- 19Describe a force - distance to charge graph for a charge
Información
- Descripción
- A level Physics Fichas sobre Electric fields, creado por Tushaar Davies el 11/11/2020.
- Creado por
- Tushaar Davies
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