Static Electricity (1) Flashcards
Explain how rubbing an acetate rod with a cloth causes the rod and cloth to become charged
Friction between cloth and rod causes electrons to move. From the acetate rod, net charge on cloth is now negative and net charge on cloth is now positive
After charging them, the student moves the acetate rod and the cloth closer together.
Which statement is correct?
Box 2
The amount of charge on the metal dome is increased, which causes the potential difference between the metal dome and the earthed sphere to __________
increase
What movement would you expect to see?
Bottom ends repel
Why do the strips move in this way?
They have the same charge and same charges repel
Each strip has a negative charge. The cloth is left with a _______ charge. This is because particles called _________ have been transferred from the ________ and __________
positive / electrons/cloth/polythene
Materials, such as aluminium, which electricity will pass through easily, are called ___________
conductors
Materials, such as polythene which electricity will not pass through easily, are called __________
insulators
What has happened to the comb to make it attract the hairs?
Becomes electrically charged
If the comb is now held above some small pieces of dry tissue paper what is likely to happen?
Comb will attract the paper
If you rub your hands all over the comb it will no longer attract your hair. Explain why
As the charge has gone to the body
The comb becomes negatively charged because _________ move from the student’s _________ to the comb
electrons / jumper
What type of charge is left on the jumper?
Positive
The ruler is ________
positively charged
Which one of the following material should the bracelet be made from?
Give a reason for your answer
Copper
It is an electric conductor
