physics unit 4 Flashcards
1
Q
live wire definition
A
supplies mains electricity to appliances
brown
2
Q
neutral wire definition
A
connection the circuit
blue
3
Q
earth wire definition
A
where electricity escapes through if there is fault
green
4
Q
alternate circuit properties
A
direction changes from + to -
electrons flow forward and backward
5
Q
direct current properties
A
direction stays the same throughout the time
electrons flow in the same way
6
Q
series circuit properties
A
- no auction / branch
- current is flowing through the same path
- one switch placed anywhere in the circuit can control the bulbs
- if one bulb breaks it creates a gap in the current
- energy is shared by all bulbs
7
Q
parallel circuit properties
A
- different junctions / branches
- current is flowing through different paths
- different switches are placed in different parts to control the bulbs individually
- if the bulb breaks only the bulbs in that particular part will be affected
- voltage remains the same in all branches
8
Q
thermistor properties
A
temperature increases = resistance decreases
9
Q
light dependent resistor properties
A
light increases = resistance decreases
10
Q
Ohm’s law
A
directly proportional
temperature is constant
11
Q
static electricity definition
A
build up of charges which do not move
