What is a switch used for?
To allow or stop the flow of current in a circuit
What is a sensor?
device that responds to changes like light, heat, or touch.
What does an LDR do?
Changes resistance depending on light — used in street lights.
What does a thermistor respond to?
Changes in temperature.
What does a capacitor do?
Stores electrical charge temporarily.
What’s the pole in a switch
The number of switching contact set
What’s the throw in a switch
The number of paths that the current has to flow
What is the positive side of a diode called?
Anode
What is the negative side of the diode called
Cathode
What are the two types of thermistors
- PTC (positive temperature coefficient)
- NTC (negative temperature coefficient)
What happens in a PTC type thermistor
The resistance increases with an increase in temperature
What happens in a NTC type thermistor
The resistance decreases with an increase in temperature
What are the two types of capacitors
- Polarised (has to be connected in a specific way)
- Non-polatised (can be connected in any direction)
