Electrostatics (9) Flashcards
Are electrons positive, negative or neutral
Negative
Are protons positive, negative or neutral
Positive
Are neutrons positive, negative or neutral
Neutral
Opposite charges _______ each other
Attract
Similar charges _____ each other
Repel
Do neutrals have the same amount of positive and negative charges
Yes
Neutral charges have an overall charge of ___
0
A negative object has ______ more electrons
A negative object had GAINED more electrons
A positive object has ______ more electrons
A positive object has lost more electrons
Why can conductors conduct electrical charge
Because they have lots of free electrons which CANNOT be charged electrostatically
Why don’t insulators conduct electrical charge
Because they have free electrons which can be charged ELECTOSTATICALLY
Name 3 uses of static electricity
Ink jet painter
Photocopier
Crop spraying
What is a Van der Graaff
A machine which generates electrostatic charge using friction
The charge is stored in a metal dome because the metal is on an insulated base
Anything touching the ground is ______
Anything touching the ground is negative
Why does a balloon stick to a wall after being rubbed on a jumper
- Neutral balloon gains negative charges when rubbed on a jumper (the jumper will then become positive)
- Negative charges in balloon are attracted to the positive charges within the neutral wall.
