Review electric and gravitational field comparisons in Edexcel A-Level Physics through inverse-square laws, radial fields and force-direction distinctions.
Electrostatic forces and gravitational forces can both be modelled by the idea of a field. Give one similarity and one difference between electric fields and gravitational fields.
Similarity
Difference
Similarity:
Both fields obey an inverse square law (for point masses/charges)
Or both fields have an infinite range
(1)
Difference:
Electric fields can be attractive or repulsive, whereas gravitational fields can only be attractive
Or electric fields exert forces on charges whereas gravitational fields exert forces on masses
(1)