Gr 8 Natural Sciences Ch 3.2 SUM: Energy transfer in electrical systems
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Questions and Answers

What carries electric charge through a closed, conducting circuit?

  • Delocalized atoms
  • Delocalized electrons (correct)
  • Delocalized protons
  • Delocalized neutrons

    • What is the purpose of a switch in a circuit?

  • To resist the flow of current
  • To provide energy to the circuit
  • To convert electrical energy into other forms of energy
  • To open or close the circuit (correct)

    • What is the term for the flow of electric charge through a conductor?

  • Electric circuit
  • Electric current (correct)
  • Electric field
  • Electric energy

    • What is the function of a conductor in a circuit?

    <p>To connect the different components of the circuit</p> Signup and view all the answers

    What is the purpose of a resistor in a circuit?

    <p>To convert electrical energy into other forms of energy</p> Signup and view all the answers

    What is required for a circuit to function?

    <p>A closed pathway</p> Signup and view all the answers

    What is the device that uses the electrical energy in a circuit?

    <p>Load</p> Signup and view all the answers

    What is the term for the electrons that are free to move in a metal?

    <p>Delocalized electrons</p> Signup and view all the answers

    What is the primary function of a resistor?

    <p>To convert electrical energy into heat</p> Signup and view all the answers

    What is the unit of measurement for resistance?

    <p>Ohms</p> Signup and view all the answers

    What type of resistor can have its resistance adjusted?

    <p>Variable Resistor</p> Signup and view all the answers

    What symbol is used to represent a cell in a circuit diagram?

    <p>A pair of parallel lines, one longer and one shorter</p> Signup and view all the answers

    What is the purpose of a fuse in an electrical circuit?

    <p>To protect the circuit from overheating</p> Signup and view all the answers

    What is the effect of an electric current flowing through a resistor?

    <p>It generates heat</p> Signup and view all the answers

    What device is used to break the circuit during overloads or short circuits?

    <p>Circuit Breaker</p> Signup and view all the answers

    What is the principle used in devices like electric bells and speakers?

    <p>Magnetic Effect</p> Signup and view all the answers

    What is the purpose of a switch in a circuit?

    <p>To break or close the circuit</p> Signup and view all the answers

    What is the symbol used to represent a variable resistor in a circuit diagram?

    <p>A zigzag line with an arrow through it</p> Signup and view all the answers

    What is the process of breaking down a liquid or solution into its component elements using an electric current?

    <p>Electrolysis</p> Signup and view all the answers

    What is the purpose of electroplating a metal object with a thin layer of another metal?

    <p>To improve the appearance, durability, and resistance to corrosion of the object</p> Signup and view all the answers

    What is the result of electrolysis of copper chloride solution?

    <p>Separation of copper and chlorine</p> Signup and view all the answers

    What is the primary function of a battery in a circuit?

    <p>To provide energy needed for the current</p> Signup and view all the answers

    What is an example of a practical application of electroplating?

    <p>Coating a metal object with a thin layer of gold or silver</p> Signup and view all the answers

    What is a common use of electroplated car parts?

    <p>To improve their appearance and prevent corrosion</p> Signup and view all the answers

    What happens when a switch is closed in a circuit?

    <p>The circuit becomes closed, allowing the current to flow</p> Signup and view all the answers

    Why is electroplating used in jewelry making?

    <p>To make inexpensive metals more attractive and affordable</p> Signup and view all the answers

    What is the main difference between a conductor and an insulator?

    <p>Conductors allow the flow of electric current, while insulators do not</p> Signup and view all the answers

    What is the result of a break in the circuit pathway?

    <p>The circuit becomes open, preventing the flow of current</p> Signup and view all the answers

    What type of circuit has multiple paths for the current to flow?

    <p>Parallel circuit</p> Signup and view all the answers

    What happens when a component fails in a series circuit?

    <p>The entire circuit is broken</p> Signup and view all the answers

    What is the purpose of a resistor in a circuit?

    <p>To oppose the flow of electric current</p> Signup and view all the answers

    What is the result of disconnecting a wire in a circuit?

    <p>The circuit becomes open, preventing the flow of current</p> Signup and view all the answers

    What is the primary function of a light bulb in a circuit?

    <p>To act as a load, converting electrical energy into light energy</p> Signup and view all the answers

    What is the difference between a cell and a battery?

    <p>A battery is essentially two or more cells connected together</p> Signup and view all the answers

    What is the primary function of a source of energy in a circuit?

    <p>To provide energy to drive the current through the circuit</p> Signup and view all the answers

    What is the role of delocalized electrons in a metal?

    <p>They are free to move and carry electric charge</p> Signup and view all the answers

    What is necessary for an electric circuit to function?

    <p>A closed pathway and an energy source</p> Signup and view all the answers

    What is the purpose of a load in a circuit?

    <p>To use the electrical energy</p> Signup and view all the answers

    What is the term for a closed pathway that allows the flow of electric current?

    <p>Electric circuit</p> Signup and view all the answers

    What is the purpose of a conductor in a circuit?

    <p>To allow the flow of electric charge</p> Signup and view all the answers

    What is the flow of electric charge through a conductor called?

    <p>Electric current</p> Signup and view all the answers

    What is necessary for an electric current to flow?

    <p>A source of energy and a closed pathway</p> Signup and view all the answers

    What is the process of coating a metal object with a thin layer of another metal using electrolysis?

    <p>Electroplating</p> Signup and view all the answers

    What is the result of electrolysis of a copper chloride solution?

    <p>Separation of copper and chlorine</p> Signup and view all the answers

    What is the primary application of electrolysis in the automotive industry?

    <p>Electroplating wheel rims with chromium</p> Signup and view all the answers

    What is the purpose of electrolysis in jewelry making?

    <p>To create a thin layer of gold or silver on inexpensive metals</p> Signup and view all the answers

    What is the chemical reaction that occurs when an electric current is passed through a solution?

    <p>Electrolysis</p> Signup and view all the answers

    What is the advantage of electroplating a metal object with a thin layer of another metal?

    <p>It improves the appearance and durability of the metal</p> Signup and view all the answers

    What is the purpose of a resistor in a kettle?

    <p>To convert electrical energy into heat</p> Signup and view all the answers

    What is the symbol used to represent a light bulb in a circuit diagram?

    <p>A circle with a cross inside</p> Signup and view all the answers

    What is the effect of an electric current flowing through a filament in a light bulb?

    <p>It heats up and emits light</p> Signup and view all the answers

    What is the purpose of a fuse in an electrical circuit?

    <p>To protect electrical circuits from overheating</p> Signup and view all the answers

    What is the principle used in electromagnets?

    <p>Magnetic effect</p> Signup and view all the answers

    What is the purpose of a circuit breaker?

    <p>To protect electrical circuits from damage</p> Signup and view all the answers

    What is the symbol used to represent a variable resistor in a circuit diagram?

    <p>A zigzag line with an arrow through it</p> Signup and view all the answers

    What happens when an electric current flows through a resistor?

    <p>It transfers energy to the resistor as heat</p> Signup and view all the answers

    What is the function of a resistor in a circuit?

    <p>To control the current flow dynamically</p> Signup and view all the answers

    What is an example of a practical application of the heating effect?

    <p>Kettles and heaters</p> Signup and view all the answers

    What is the primary function of a battery in a circuit?

    <p>To provide the energy needed for the current</p> Signup and view all the answers

    What is the characteristic of a material that allows it to allow the flow of electric current?

    <p>It is a conductor</p> Signup and view all the answers

    What happens when the switch is open in a circuit?

    <p>The circuit is broken and current does not flow</p> Signup and view all the answers

    What is the difference between a series circuit and a parallel circuit?

    <p>A series circuit has a single path for the current to flow, while a parallel circuit has multiple paths</p> Signup and view all the answers

    What is the purpose of a light bulb in a circuit?

    <p>To act as a load, converting electrical energy into light energy</p> Signup and view all the answers

    What is the result of a break in the circuit pathway?

    <p>The circuit is broken and current does not flow</p> Signup and view all the answers

    What is the characteristic of a material that does not allow the flow of electric current?

    <p>It is an insulator</p> Signup and view all the answers

    What is the function of a wire in a circuit?

    <p>To conduct the current between the battery, switch, and bulb</p> Signup and view all the answers

    What is the purpose of a resistor in a circuit?

    <p>To control the flow of current</p> Signup and view all the answers

    What is the difference between a cell and a battery?

    <p>A cell is a single unit, while a battery is two or more cells connected together</p> Signup and view all the answers

    What is the primary function of a resistor in a circuit?

    <p>To convert electrical energy into other forms of energy</p> Signup and view all the answers

    What is the role of delocalized electrons in a metal?

    <p>To flow freely within the metal</p> Signup and view all the answers

    What is required for an electric circuit to function?

    <p>An energy source and a closed pathway</p> Signup and view all the answers

    What happens when a switch is closed in a circuit?

    <p>The flow of electric current is enabled</p> Signup and view all the answers

    What is the primary function of a load in a circuit?

    <p>To use the electrical energy</p> Signup and view all the answers

    What is the term for the flow of electric charge through a conductor?

    <p>Electric current</p> Signup and view all the answers

    What is the primary function of a conductor in a circuit?

    <p>To connect the different components of the circuit</p> Signup and view all the answers

    What is necessary for an electric current to flow?

    <p>A source of energy and a closed pathway</p> Signup and view all the answers

    What is the main function of a light bulb in a circuit?

    <p>To convert electrical energy into light energy</p> Signup and view all the answers

    What happens when a switch is open in a circuit?

    <p>The circuit is broken and current does not flow</p> Signup and view all the answers

    What is the difference between a series and a parallel circuit?

    <p>A series circuit has multiple components connected end-to-end</p> Signup and view all the answers

    What is the purpose of a conductor in a circuit?

    <p>To allow the flow of electric current</p> Signup and view all the answers

    What is the result of a break in the circuit pathway?

    <p>The circuit is broken and current does not flow</p> Signup and view all the answers

    What is the primary function of a battery in a circuit?

    <p>To provide energy to the circuit</p> Signup and view all the answers

    What is the term for materials that allow the flow of electric current?

    <p>Conductors</p> Signup and view all the answers

    What is the result of disconnecting a wire in a circuit?

    <p>The circuit is broken and current does not flow</p> Signup and view all the answers

    What is the purpose of a resistor in a circuit?

    <p>To control the flow of current</p> Signup and view all the answers

    What is the difference between a cell and a battery?

    <p>A cell is a single source of energy, while a battery is multiple cells connected together</p> Signup and view all the answers

    What is the primary function of a resistor in a circuit?

    <p>To convert electrical energy into heat</p> Signup and view all the answers

    How is the resistance of a resistor indicated?

    <p>By a series of colored bands</p> Signup and view all the answers

    What is the purpose of a circuit breaker?

    <p>To protect electrical circuits from damage</p> Signup and view all the answers

    What is the symbol used to represent a switch in a circuit diagram?

    <p>A break in the line with an opening or closing line</p> Signup and view all the answers

    What is the effect of an electric current flowing through a resistor?

    <p>Generation of heat</p> Signup and view all the answers

    What is the principle used in devices like electric bells and speakers?

    <p>Magnetic effect</p> Signup and view all the answers

    What is the purpose of a fuse in an electrical circuit?

    <p>To protect electrical circuits from overheating</p> Signup and view all the answers

    What is the symbol used to represent a variable resistor in a circuit diagram?

    <p>A zigzag line with an arrow</p> Signup and view all the answers

    What is the purpose of a resistor in a kettle?

    <p>To convert electrical energy into heat</p> Signup and view all the answers

    What is the result of electric current flowing through a resistor?

    <p>Heating of the resistor</p> Signup and view all the answers

    What is the primary application of electrolysis in the jewelry industry?

    <p>To electroplate a thin layer of a more expensive metal on a less expensive one</p> Signup and view all the answers

    What is the result of passing an electric current through a copper chloride solution?

    <p>The solution breaks down into copper and chlorine</p> Signup and view all the answers

    What is the purpose of electroplating car parts with chromium?

    <p>To improve the appearance and prevent corrosion</p> Signup and view all the answers

    What is the process of breaking down a solution into its component elements using an electric current called?

    <p>Electrolysis</p> Signup and view all the answers

    What is the advantage of electroplating a metal object with a thin layer of another metal?

    <p>It improves the appearance and durability of the metal</p> Signup and view all the answers

    What is the primary function of electrolysis in the automotive industry?

    <p>To electroplate car parts with chromium</p> Signup and view all the answers

    What is the primary function of a conductor in a circuit?

    <p>To allow the flow of electric current</p> Signup and view all the answers

    What type of circuit has a single path for the current to flow?

    <p>Series circuit</p> Signup and view all the answers

    What happens when the switch is closed in a circuit?

    <p>The current flows through the circuit</p> Signup and view all the answers

    What is the purpose of a fuse in an electrical circuit?

    <p>To break the circuit during overloads or short circuits</p> Signup and view all the answers

    What is the result of a break in the circuit pathway?

    <p>The circuit is open</p> Signup and view all the answers

    What is the primary function of a load in a circuit?

    <p>To convert electrical energy into light energy</p> Signup and view all the answers

    What is the difference between a cell and a battery?

    <p>A cell is a single source of energy, while a battery is multiple cells connected together</p> Signup and view all the answers

    What is the purpose of a resistor in a circuit?

    <p>To control the flow of current</p> Signup and view all the answers

    What is the result of electrolysis of a copper chloride solution?

    <p>Copper is deposited at the cathode</p> Signup and view all the answers

    What is the primary application of electrolysis in the automotive industry?

    <p>Electroplating car parts</p> Signup and view all the answers

    What is the primary advantage of electroplating a metal object with a thin layer of another metal?

    <p>To improve its appearance, durability, and resistance to corrosion</p> Signup and view all the answers

    What is the result of passing an electric current through a copper chloride solution?

    <p>The separation of copper and chlorine</p> Signup and view all the answers

    What is the term for the process of breaking down a liquid or solution into its component elements using an electric current?

    <p>Electrolysis</p> Signup and view all the answers

    What is the primary application of electrolysis in the automotive industry?

    <p>Electroplating of car parts</p> Signup and view all the answers

    What is the purpose of electroplating jewelry with a thin layer of another metal?

    <p>To improve its appearance and make it more affordable</p> Signup and view all the answers

    What is the chemical reaction that occurs when an electric current is passed through a solution?

    <p>Electrolysis</p> Signup and view all the answers

    In a circuit diagram, what symbol is used to represent a variable resistor?

    <p>A zigzag line with an arrow through it</p> Signup and view all the answers

    What is the purpose of a fuse in an electrical circuit?

    <p>To protect electrical circuits from overheating</p> Signup and view all the answers

    What is the effect of an electric current flowing through a resistor?

    <p>The resistor converts electrical energy into heat</p> Signup and view all the answers

    What is the principle used in electromagnets?

    <p>Electric current creating a magnetic field</p> Signup and view all the answers

    What is the purpose of a resistor in a kettle?

    <p>To convert electrical energy into heat</p> Signup and view all the answers

    What is the result of an electric current flowing through a filament in a light bulb?

    <p>The filament heats up and emits light</p> Signup and view all the answers

    What is the unit of measurement for the heat produced by an electric current?

    <p>Joules</p> Signup and view all the answers

    What is the purpose of a circuit breaker in a household?

    <p>To protect electrical circuits from overheating and damage</p> Signup and view all the answers

    What is the effect of an electric current flowing through a resistor in a heating element?

    <p>The resistor converts electrical energy into heat</p> Signup and view all the answers

    What is the purpose of a resistor in a circuit?

    <p>To convert electrical energy into heat</p> Signup and view all the answers

    What is the primary purpose of a load in an electric circuit?

    <p>To utilize the electrical energy</p> Signup and view all the answers

    What is the role of delocalized electrons in a metal?

    <p>To carry electric charge</p> Signup and view all the answers

    What is necessary for an electric circuit to function?

    <p>A closed pathway and a conductor</p> Signup and view all the answers

    What is the purpose of a switch in a circuit?

    <p>To control the flow of electric current</p> Signup and view all the answers

    What happens when a component fails in a series circuit?

    <p>The entire circuit stops functioning</p> Signup and view all the answers

    What is the term for a closed pathway that allows the flow of electric current?

    <p>Electric circuit</p> Signup and view all the answers

    What is the primary function of a source of energy in a circuit?

    <p>To provide energy to the circuit</p> Signup and view all the answers

    What is the primary advantage of electroplating a metal object with a thin layer of another metal?

    <p>To improve the appearance, durability, and resistance to corrosion of the object</p> Signup and view all the answers

    What is the term for the process of breaking down a liquid or solution into its component elements using an electric current?

    <p>Electrolysis</p> Signup and view all the answers

    What is the result of electrolysis of a copper chloride solution?

    <p>Separation of copper and chlorine</p> Signup and view all the answers

    What is the primary application of electrolysis in the automotive industry?

    <p>Electroplating car parts to prevent corrosion</p> Signup and view all the answers

    What is the purpose of electroplating jewelry with a thin layer of gold or silver?

    <p>To improve the appearance and durability of the jewelry</p> Signup and view all the answers

    What is the chemical reaction that occurs when an electric current is passed through a solution?

    <p>Electrolysis</p> Signup and view all the answers

    What is the advantage of electroplating a metal object with a thin layer of another metal in the automotive industry?

    <p>To improve the appearance and durability of the metal object</p> Signup and view all the answers

    What is the result of electrolysis of a copper chloride solution in terms of the elements separated?

    <p>Copper and chlorine</p> Signup and view all the answers

    What is the primary reason for electroplating a metal object with a thin layer of another metal?

    <p>To improve the appearance, durability, and resistance to corrosion of the object</p> Signup and view all the answers

    What is the process of coating a metal object with a thin layer of another metal using electrolysis?

    <p>Electroplating</p> Signup and view all the answers

    What is the main advantage of electroplating a metal object with a thin layer of another metal?

    <p>To improve the appearance, durability, and resistance to corrosion of the object</p> Signup and view all the answers

    What is the process of breaking down a liquid or solution into its component elements using an electric current called?

    <p>Electrolysis</p> Signup and view all the answers

    What is the purpose of electrolysis in jewelry making?

    <p>To coat inexpensive metals with a thin layer of a precious metal</p> Signup and view all the answers

    What is an example of a practical application of electrolysis?

    <p>Electroplating car parts</p> Signup and view all the answers

    What is the result of electrolysis of copper chloride solution?

    <p>Separation of copper and chlorine</p> Signup and view all the answers

    What is the primary application of electrolysis in the automotive industry?

    <p>Electroplating car parts, such as wheel rims</p> Signup and view all the answers

    What is the chemical reaction that occurs when an electric current is passed through a solution?

    <p>Electrochemical reaction</p> Signup and view all the answers

    What is the purpose of electroplating a metal object with a thin layer of another metal?

    <p>To improve the appearance, durability, and resistance to corrosion of the object</p> Signup and view all the answers

    What is an example of a practical application of electroplating?

    <p>Electroplating jewelry and car parts</p> Signup and view all the answers

    What is the result of electrolysis of a solution?

    <p>Separation of the solution into its component elements</p> Signup and view all the answers

    What is the primary purpose of electrolysis in electroplating?

    <p>To improve the appearance and durability of the metal object</p> Signup and view all the answers

    What is the result of passing an electric current through a solution?

    <p>The solution breaks down into its component elements</p> Signup and view all the answers

    What is the primary advantage of electroplating a metal object with a thin layer of another metal?

    <p>It improves the appearance and durability of the metal</p> Signup and view all the answers

    What is the common application of electroplating in the automotive industry?

    <p>Electroplating car parts with chromium to prevent corrosion</p> Signup and view all the answers

    What is the primary use of electrolysis in jewelry making?

    <p>To coat inexpensive metals with gold or silver to make jewelry more attractive and affordable</p> Signup and view all the answers

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