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 (A)</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 (B)</p> Signup and view all the answers

What is required for a circuit to function?

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

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

<p>Load (B)</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 (D)</p> Signup and view all the answers

What is the primary function of a resistor?

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

What is the unit of measurement for resistance?

<p>Ohms (C)</p> Signup and view all the answers

What type of resistor can have its resistance adjusted?

<p>Variable Resistor (C)</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 (D)</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 (B)</p> Signup and view all the answers

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

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

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

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

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

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

What is the purpose of a switch in a circuit?

<p>To break or close the circuit (B)</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 (D)</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 (A)</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 (B)</p> Signup and view all the answers

What is the result of electrolysis of copper chloride solution?

<p>Separation of copper and chlorine (A)</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 (B)</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 (C)</p> Signup and view all the answers

What is a common use of electroplated car parts?

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

Why is electroplating used in jewelry making?

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

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

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

What happens when a component fails in a series circuit?

<p>The entire circuit is broken (D)</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 (A)</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 (B)</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 (A)</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 (B)</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 (D)</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 (C)</p> Signup and view all the answers

What is necessary for an electric circuit to function?

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

What is the purpose of a load in a circuit?

<p>To use the electrical energy (B)</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 (D)</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 (B)</p> Signup and view all the answers

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

<p>Electric current (C)</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 (C)</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 (B)</p> Signup and view all the answers

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

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

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

<p>Electroplating wheel rims with chromium (C)</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 (C)</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 (A)</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 (D)</p> Signup and view all the answers

What is the purpose of a resistor in a kettle?

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

What is the principle used in electromagnets?

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

What is the purpose of a circuit breaker?

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

What is the function of a resistor in a circuit?

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

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

<p>Kettles and heaters (B)</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 (B)</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 (A)</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 (D)</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 (C)</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 (A)</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 (B)</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 (A)</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 (B)</p> Signup and view all the answers

What is the purpose of a resistor in a circuit?

<p>To control the flow of current (C)</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 (C)</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 (D)</p> Signup and view all the answers

What is the role of delocalized electrons in a metal?

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

What is required for an electric circuit to function?

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

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

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

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

<p>Electric current (D)</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 (D)</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 (C)</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 (B)</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 (C)</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 (C)</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 (D)</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 (B)</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 (A)</p> Signup and view all the answers

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

<p>Conductors (B)</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 (C)</p> Signup and view all the answers

What is the purpose of a resistor in a circuit?

<p>To control the flow of current (D)</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 (C)</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 (C)</p> Signup and view all the answers

How is the resistance of a resistor indicated?

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

What is the purpose of a circuit breaker?

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

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

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

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

<p>Magnetic effect (B)</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 (A)</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 (A)</p> Signup and view all the answers

What is the purpose of a resistor in a kettle?

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

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

<p>Heating of the resistor (C)</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 (C)</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 (D)</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 (B)</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 (A)</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 (A)</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 (D)</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 (C)</p> Signup and view all the answers

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

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

What happens when the switch is closed in a circuit?

<p>The current flows through the circuit (A)</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 (B)</p> Signup and view all the answers

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

<p>The circuit is open (C)</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 (D)</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 (B)</p> Signup and view all the answers

What is the purpose of a resistor in a circuit?

<p>To control the flow of current (D)</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 (A)</p> Signup and view all the answers

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

<p>Electroplating car parts (B)</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 (C)</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 (B)</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 (C)</p> Signup and view all the answers

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

<p>Electroplating of car parts (D)</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 (D)</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 (D)</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 (C)</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 (D)</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 (D)</p> Signup and view all the answers

What is the principle used in electromagnets?

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

What is the purpose of a resistor in a kettle?

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

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

<p>Joules (A)</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 (C)</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 (D)</p> Signup and view all the answers

What is the purpose of a resistor in a circuit?

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

What is the role of delocalized electrons in a metal?

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

What is necessary for an electric circuit to function?

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

What happens when a component fails in a series circuit?

<p>The entire circuit stops functioning (C)</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 (C)</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 (A)</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 (C)</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 (C)</p> Signup and view all the answers

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

<p>Separation of copper and chlorine (A)</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 (B)</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 (D)</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 (B)</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 (B)</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 (D)</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 (A)</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 (A)</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 (B)</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 (B)</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 (A)</p> Signup and view all the answers

What is an example of a practical application of electrolysis?

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

What is the result of electrolysis of copper chloride solution?

<p>Separation of copper and chlorine (D)</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 (B)</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 (D)</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 (A)</p> Signup and view all the answers

What is an example of a practical application of electroplating?

<p>Electroplating jewelry and car parts (C)</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 (C)</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 (B)</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 (A)</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 (C)</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 (D)</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 (A)</p> Signup and view all the answers

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