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BGE Electricity

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  • How is a voltmeter connected in a circuit?
    In parallel - across a component
  • What is a cell?
    A device that converts chemical energy into electrical energy
  • What is voltage?
    The energy carried by electrons
  • What happens to all the bulbs in a series circuit if one bulb breaks?
    They all go out
  • What are the charged particles that travel through the electrolyte called?
    Ions
  • In which direction do electrons flow in a circuit?
    From the negative terminal to the positive terminal of a cell
  • Name one disadvantage of a series circuit
    If one component breaks, all components stop working
  • Give a real-life example of a parallel circuit in the home
    Household lighting / plug sockets in a room
  • What two metals were used in the lemon cell experiment?
    Zinc and copper
  • In a series circuit, how is voltage shared between bulbs?
    It is shared (split) between them
  • What instrument is used to measure voltage?
    A voltmeter
  • Name one advantage of a series circuit
    All components can be turned on and off at the same time
  • In a parallel circuit, what happens to the voltage across each branch?
    It is the same as the supply voltage
  • What happens when two opposite charges are brought together?
    They attract each other
  • What is the rule for voltage in a parallel circuit?
    The voltage across the supply is the same as across each branch
  • Which terminal do electrons leave from in a cell?
    The negative terminal
  • What is a cell made from?
    Two different metals (electrodes) and a chemical substance (electrolyte)
  • Name one example of an insulator
    Any non-metal e.g. plastic, rubber, wood
  • What is the rule for voltage in a series circuit?
    The voltage across the supply equals the sum of the voltages across each component
  • Where must an ammeter be placed to measure current?
    In series - you must break into the circuit to insert it
  • Why is current the same everywhere in a series circuit?
    Because there is only one path for the current to flow
  • In a series circuit, how does the current at different points compare?
    It is the same at all points
  • What happens to the brightness of bulbs as more are added to a parallel circuit?
    They stay the same brightness
  • Name one advantage of a parallel circuit
    If one component breaks, the others continue to work
  • What do we call electricity that builds up on a material when it is rubbed?
    Static electricity
  • What is the rule for current in a parallel circuit?
    The currents in the branches add up to the total current from the battery (A1 = A2 + A3)
  • What unit is used to measure voltage?
    Volts (V)
  • What happens to the brightness of bulbs as more are added to a series circuit?
    They get dimmer
  • What type of energy do batteries convert to electrical energy?
    Chemical energy
  • What happens to the other bulbs in a parallel circuit if one bulb breaks?
    They are not affected and continue to work
  • What is the difference between a cell and a battery?
    A battery is made up of multiple cells
  • Name one example of a conductor
    Any metal (e.g. copper, iron) or graphite
  • What is an insulator?
    A material that does not allow electrical current to pass through it
  • What is electrical current?
    The flow of negative charges (electrons) around a circuit
  • How many paths does current have in a parallel circuit?
    More than one path (branches)
  • What are the two types of electrical charge?
    Positive and negative
  • What piece of equipment is used to measure electrical current?
    An ammeter
  • What unit is used to measure electrical current?
    Amps (A)
  • What is an electrolyte in a cell?
    A substance that allows charged particles (ions) to flow between the two metals
  • What must exist for an electrical current to flow?
    A complete circuit
  • How many paths does the current have in a series circuit?
    One
  • In the lemon cell experiment, what acts as the electrolyte?
    The lemon juice
  • What happens when two charges of the same type are brought together?
    They repel each other
  • What type of energy does a cell convert, and into what?
    Chemical energy into electrical energy
  • What is a conductor?
    A material that allows electrical current to pass through it
  • What is the name of the particles that flow through wires in a circuit?
    Electrons
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