Coulomb’s Law Flashcards
Describe how the force between two point charges depends on distance Calculate the force between two charged objects Explain what the sign of the force (+ or -) indicates
1
Q
State Coulomb’s Law
A
F = kQ1Q2/r2
2
Q
What does k equal?
A
1/4πe
3
Q
Coulomb’s law applies strictly to…
A
A vacuum
4
Q
What does the sign of the force between two charged objects indicate
A
+ force is attractive
- force is repulsive
5
Q
Describe how the force between two point charge depends on distance
A
As the distance increases the force decreases in proportion to 1/r2
6
Q
State an assumption made with Coulomb’s Law
A
Charge acts at the centre of the sphere
7
Q
Why are the magnitudes of electrostatic forces between subatomic particles greater than that of the gravitational forces?
A
The masses of subatomic particles are incredibly small whereas their charges are much larger
