Module 1: Lesson 1 Flashcards
What is the SI unit of charge?
Coloumb (C)
What is the charge of an electron?
-1e
What is the charge of a proton?
+1e
What is the charge of a neutron?
0e
What is the net charge of a rod?
Positive charge
What is the charge of a sphere?
Neutral charge
What happens to a sphere when a positively charged object is brought near it?
The negative charges in the sphere are attracted to the positive charges in the rod. The positive charges of the sphere are repelled to the opposite side.
If the force between charges is distance dependent, what can we say about the net force on the sphere?
The forces don’t balance because the negative charges of the sphere are closer to the positive charges of the rod.
What would happen to a neutrally charged object when brought near a negatively charged rod?
The positive charges of the neutral object are attracted to the negative charges of the rod, while the negative charges of the neutral object are repelled. The neutral object is attracted to the rod.
What is the net charge of the atomic nucleus?
Positive
What is the net charge of an atomic electron cloud?
Negative
What is the charge of a water molecule? Why?
The water molecule is neutrally charged because it is a polar molecule.
What is a conductor?
A material that allows electric charges to move through easily (ex. metals, salt water). They are easily polarized.
What is electrostatic equilibrium?
Charges arrange themselves in a stable distribution against a conductor.
What is a current?
When charge flows in an organized way through a conducting material.
What is an insulator?
A material that does NOT allow electric charges to move through it easily (ex. glass, plastic, pure water).
Can insulators be polarized.
Yes, but the charge will stay in its place.
What is an ionic solution?
A solution where both positive and negative charges are free to move.
