Hello everyone!
In 6th grade we are studying the ELECTRICITY. Let us show you some of the contents learnt:
We know that all objects have electrical charges. Some charges are positive,
PROTONS, and some are negative,
ELECTRONS.
Sometimes, the negative charges pass from one object to another. For example:
- By rubbing a pen to a piece of cloth, we pass negative charges from the cloth to the pen. Now the pen is (negatively) electrically charged. So, it can attract small pieces of paper.
- Or by rubbing a balloon to a piece of cloth, we pass negative charges to the balloon. So, it is attracted to other objects:
- But when we approach 2 negatively charged balloons, they repel:
This is STATIC ELECTRICITY.
We also know ho to build an electrical circuit, which carries electrical current:
Finally, we can say if some materials are conductors or insulators after adding them into the circuit. For example:
Wood: insulator.
Pencil lead: conductor.
Pencil lead: conductor.
Salt water: conductor.