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STEM Electric Circuits

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  • What is the name of the negative electrode in electrolysis?
    Cathode
  • What does LED stand for?
    LED stands for a Light Emitting Diode
  • Where do we place an ammeter when we measure current in a circuit - in series or in parallel?
    When we measure current we place the meter in series in the circuit.
  • Two identical bulbs are in parallel in a complete circuit. A third identical bulb is connected in parallel. What happens?
    All the bulbs are the same brightness
  • What is electrical resistance?
    Electrical resistance is opposition to the flow of current
  • Electrical wires are usually made of copper because copper is...
    Copper is a very good conductor of electricity
  • Does graphite conduct electricity?
    Yes it does!
  • Three identical bulbs are in parallel in a complete circuit. How is the current split - in three or not at all?
    The current is split equally across the the three bulbs
  • Two bulbs are in a series circuit - what happens to the bulbs if the voltage is increased?
    The bulbs get brighter - the current increases with the voltage
  • What instrument do we use to measure potential difference?
    A voltmeter is used to measure potential difference
  • When we measure potential difference do we place the voltmeter in series or in parallel?
    When we measure potential difference we place the voltmeter in parallel
  • What are the names of the positive and negative electrodes in electrolysis?
    Anode and Cathode
  • Why are electrical wires coated in plastic?
    Wires are coated in plastic because the plastic used is an insulator and doesn't conduct electricity
  • Is this a series or a parallel circuit/
    series circuit
  • What piece of equipment do we use the measure current?
    We use an ammeter
  • Which is the positive electrode in electrolysis; anode or cathode?
    Anode
  • Is this a series or a parallel circuit?
    A parallel circuit
  • What is then name of the carbon based material which is one atom thick?
    Graphene
  • What type of ions are attracted to the anode; positive or negative?
    Negative ions are attracted to the positive anode!
  • What is the name of the electro-chemical process in the picture?
    Electrolysis
  • What type of ions are attracted to the cathode; positive or negative?
    Positive ions are attracted to the negative cathode!