Paper 2: Circuit Symbols Flashcards
What is a cells purpose?
Provides a potential difference
What is the purpose of battery’s?
Provides a potential difference
What is the purpose of switches?
Allows the current to flow to be switched on / off
What is the purpose of voltmetres?
Measures potential difference across a component
What is purpose of an ammeter?
Measures the current flowing through a component
What is the purpose of a fixed resistor?
Provides a fixed resistance to the flow of current
What is the purpose of a variable resistor?
Provides a variable ( changeable) resistance
What is the purpose of a filament lamp?
Converts electrical energy to light energy as a useful form of
What is the purpose of a motor?
Converts electrical energy to kinetic energy as a useful form of
What is the purpose of a diode?
Allows current to flow in ONE DIRECTION ONLY
What is the purpose of a thermistor?
Resistance decreases when the temperature increases
What is the purpose of LDR?
Resistance decreases when the light intensity increases
What is the purpose of a LED?
A diode that gives out light when current flows through it