Circuits Flashcards
1
Q
RQ- the resistance of a wire?
A
Resistance is proportional to its length meaning that the property of conducted opposes the current flow through it
2
Q
Explain the action of a thermistor
A
A precise and predictable change in resistance is proportional to small changes in temperature
3
Q
PD and frequency of mains supply?
A
PD is about 230V
Frequency is about 50Hz
4
Q
Action of the fuse?
A
Is implace to break the circuit if a fault in the appliance occurs that causes too much current
Protects the equipment
5
Q
What is the colour code for UK mains wire?
A
Live wire= brown
Earth wire= green and yellow
Neutral wire=blue
