(a) Increasing the magnitude of the charges on two charged particles and decreasing the distance between the particles increases the strength of the electric force between the particles.
(b) Iron filings can provide evidence that can be used to explain how two magnets exert forces on each other because each of the magnet can attract the iron filings.
Force between two particles
The electrostatic force between two particles is determined from Coulomb's law as shown below;
F = kq₁q₂/r²
where;
- q₁ is magnitude of the first charge
- q₂ is magnitude of the second charge
- r is the distance between the two charges
Thus, from the equation above, increasing the magnitude of the charges on two charged particles and decreasing the distance between the particles increases the strength of the electric force between the particles.
Force between two magnets by iron filings
Iron filings can provide evidence that can be used to explain how two magnets exert forces on each other because each of the magnet can attract the iron filings.
Learn more about iron filings here: https://brainly.com/question/7692322
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