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Aims:Describe simple experiments using electrostatic chargesState that there are positive and negative chargesState that unlike charges attract and that like charges repelState that charge is measured in coulombsDescribe charging by induction Recall and use the simple electron model to distinguish between conductors and insulators and give examples.
If you bring a negatively charged rod near a piece of paper, why does the paper stick to the rod?
The paper has no charge!
As the rod approaches the paper, the electrons in the paper are repelled away from the rod.
This makes one side of the paper negative and one side positive, a charge has been induced on the paper and the positive side of the paper is attracted to the negative rod.
If you bring a positively charged rod near a piece of paper, why does the paper stick to the rod?
The paper has no charge!
As the rod approaches the paper, the electrons in the paper are attracted towards the rod.
This makes one side of the paper negative and one side positive, a charge has been induced on the paper and the negative side of the paper is attracted to the positive rod.
• Core• Describe simple experiments to show the production and
detection of electrostatic charges• State that there are positive and negative charges• State that unlike charges attract and that like charges repel• Distinguish between electrical conductors and insulators