How is a fuse different than a circuit breaker? 2. Why does your hair stand on end after being rubbed with a balloon?

Q: What’s a Coulomb? A coulomb is a unit to measure the amount of electrical charge in an object 1 Coulomb = 6.241506×1018 electrons Coulomb's Law is one of the basic ideas of electricity in physics.

Q: What’s a Coulomb? Tells us 2 things: As distance increases, the force between objects decrease. As charges of two objects increase, the force between them increases.

Q: What’s a Coulomb? The force between the objects can be positive or negative depending on whether the objects are attracted (+ force) to each other or repulsed (- force).

Q: What’s a Coulomb? Equation to represent Coulombs Law: It looks scary, but think of Newton’s law of gravitation – F = G m1m2 / d2 F = k q1x q2 r2

Coulomb’s Law F = k q1x q2 r2 F = force k = constant (changes based on the medium of electron travel) q = charge of objects (1 and 2) r = distance between their centers

If I quadruple the distance between 2 objects, the electrical force between them will ________ by ____. If I triple the charges of both objects, the electrical force between them will _______ by _____. If I triple the charge of one object only, the electrical force between them will _________ by ____. decrease 16 increase 9 increase 3

If I cut the charge of both objects in half, the force between them will _________ by ____. If I decrease the distance between them by a factor of 5, the force between them will _________ by ____. decrease 4 increase 25