Circuit Components

• Voltmeter - measures potential difference

  
• Heater - transfer energy from circuit to heat surrounding

  
• Fuse - will break if current exceeds a set amount

  
• Variable Resistor - allows current to be varied

  
• Fixed Resistor - able to limit current

  
• Ammeter - measure current

  
• Light emitting diode - emits light when current passes through it

  
• Diode - allows current through in only one direction

  
• Bulb - emit light when current passes through

  
• Switch - enables current in a circuit to be switched on or off

  
• Cell - pushes electrons round circuit