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Flashcards in Physics 2b Deck (14)
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What is Static electricity?

Charges that are not free to move

1

What happens when certain insulating materials are rubbed together?

Negatively charged electrons will be taken off one and added to the other

2

Give an example of an insulating material

A polythene rod

3

What does an acetate rod do differently to a polythene rod?

Acetate gives electrons and polythene takes them

4

Does the acetate rod become positively or negatively charged? Why does it do this?

Acetate rod becomes positive because the rod loses the negative electrons

5

True or false - Positive charges move

False - only negatives move

6

What do opposite charges do ?

Attract

7

Why do the acetate and polythene rods manage to make you hair stand on end ?

They attract the opposite charge

8

What is current ?

The flow of electric charge round a circuit

9

What is the sign for current ?

A

10

What is potential difference ?

The driving force which carries the current around a circuit

11

What is the sign of potential difference ?

V

12

What is resistance ?

Anything in the circuit which slows the flow down

13

What is the sign for resistance ?

Omega