Components

• A light emitting diode (LED) will..

  Only allow current to flow in one direction.

  Emit light when current flows through.
• Ammeters..

  Measure current

  Added to circuit in series
• Voltmeters..

  Measure potential difference

  Added to circuit in parallel
• A resistor whose resistance decreases when temp increases is a..

  Thermistor
• Which type of resistor allows us to easily adjust to its resistance..

  Variable resistor
• A resistor which cannot vary the amount of resistance it provides is a..

  Fixed resistor