P3 Electricity Flashcards
1
Q
- Electrons are…
- Protons are…
- An uncharged object is…
A
- Negative
- Positive
- Neutral
2
Q
When you charge an object what moves?
A
Electrons - never the protons
3
Q
Charging by friction e.g. rubbing a rod with a cloth…
- The acetate rod becomes … by transferring electrons … the cloth.
- The polythene rod becomes by gaining electrons the cloth.
A
- Positive, to
2. Negative, from
4
Q
- Like charges …
2. Unlike charges …
A
- Repel
2. Attract
5
Q
Electric field lines go from…
A
Positive to negative
6
Q
Close together field lines mean
A
Strong electric field
7
Q
What is current
A
The rate of flow of charge
8
Q
We show current going from positive to negative in s circuit, what is this called?
A
Conventional current - Benjamin Franklin
9
Q
Current:
Symbol
Unit
A
Symbol - I
Unit - Amps
10
Q
Charge:
Symbol
Unit
A
Symbol - Q
Unit - Coulombs
11
Q
PD
Symbol
Unit
A
Symbol - V
Unit - Volts
12
Q
Resistance
Symbol
Unit
A
Symbol - R
Unit - Ohms Ω
