Easy
What is the unit of electric charge?
Coulomb
Coulomb’s Law states that the electric force is inversely proportional to which quantity?
The square of the distance between charges
In a system of three charges, how do you calculate the net force on one charge?
By vector addition of the forces exerted by the other two charges
A proton has what type of electric charge?
Positive
If the force between two charges is 2N at 1 meter, what will the force be at 2 meters?
0.5N
How many electrons are equivalent to a charge of 1C?
6.25×10^18 electrons
What happens when two like charges are brought close together?
They repel each other
Two charges, +3μC and -3μC, are separated by 0.1 meters. Is the force between them attractive or repulsive?
Attractive
Given two charges q1=2μC and q2=4μC, separated by 6 cm, calculate the electric force using Coulomb’s Law.
20 N
What is the law that describes the force between two point charges?
Coulomb’s Law
What happens to the electric force between two charges if the distance is halved?
The force becomes four times stronger
What is the proportionality constant kkk in Coulomb’s Law, and what does it represent?
9×10^9 Nm^2/C^2, representing the strength of the electric force in a vacuum