This document describes key concepts of electrostatic charging including: 1) charging by rubbing and induction can be explained using ray diagrams, 2) rubbing transfers electrons between objects causing electrostatic charge, and 3) experiments can demonstrate charging by induction and the forces between charges.
2. After going through this module, you are expected to:
1. describe charging by rubbing and charging by induction using ray
diagram;
2. explain the role of electron transfer in electrostatic charging by
rubbing; and
3. describe experiments to show electrostatic charging by induction.
3. Pairs of electrical charges have a force that acts
between them. It is called the electric force.
The electric force can be either
attractive or repulsive.
5. Have you ever experience something in the parts of your body
that you can’t explain where it came from? Like...
These are examples of
how charges transfer
from one object to
another
6. Try rubbing a balloon with a piece of
cloth and place it near running water
on your faucet...
What do you observe?
7. The process of supplying the electric charge to
an object or losing an electric charge from an
object is called charging.
Electric charge is conserved.
8. Positive charge:
When an object has a positive
charge, it means that it has
more protons than electrons.
Negative charge:
When an object has a negative
charge, it means that it has more
electrons than protons.
Neutral charge
When an object has an equal number of protons and electrons it means the
object is neutrally charged.
9. The law for electrostatic charge simply tells us
that like charges repel and unlike charges
attract.
