Gr 8 Natural Sciences Ch 3.2: Circuits and current electricity
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Questions and Answers

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

  • To increase the flow of current
  • To act as a switch and control the flow of current
  • To provide energy to the circuit
  • To convert electrical energy into other forms of energy (correct)

    • What type of electrons carry electric charge in metals?

  • Bound electrons
  • Stationary electrons
  • Static electrons
  • Delocalized electrons (correct)

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

  • To increase the voltage in the circuit
  • To open or close the circuit, controlling the flow of current (correct)
  • To reduce the resistance in the circuit
  • To decrease the current in the circuit

    • What is required for an electric circuit to function?

    <p>A complete, closed pathway</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 allow the flow of electric current</p> Signup and view all the answers

    What component of a circuit provides energy to the circuit?

    <p>Energy source</p> Signup and view all the answers

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

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

    What is the purpose of a switch in a circuit?

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

    What happens when a circuit is open?

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

    What is the purpose of the negative terminal of a cell?

    <p>To provide a path for electrons to flow from the cell</p> Signup and view all the answers

    What is a characteristic of a series circuit?

    <p>Components are connected end-to-end</p> Signup and view all the answers

    What happens when one component fails in a series circuit?

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

    What is a characteristic of a parallel circuit?

    <p>Components are connected in multiple paths</p> Signup and view all the answers

    What happens when one component fails in a parallel circuit?

    <p>The current can still flow through the other paths</p> Signup and view all the answers

    What is the result of a closed circuit?

    <p>The bulb lights up</p> Signup and view all the answers

    What is the primary function of an energy source in an electric circuit?

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

    What is the term for the electrons that carry electric charge in metals?

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

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

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

    What is necessary for an electric current to flow through a circuit?

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

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

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

    What type of pathway is necessary for an electric current to flow?

    <p>Closed pathway</p> Signup and view all the answers

    What is the purpose of a conductor in an electric circuit?

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

    What is the result of connecting a source of energy to a circuit?

    <p>The electrons move in the same general direction</p> Signup and view all the answers

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

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

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

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

    In a series circuit, what happens to the current if one component fails?

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

    What is the purpose of a wire in a simple circuit?

    <p>To conduct the current between the components</p> Signup and view all the answers

    What is the difference between a conductor and an insulator?

    <p>A conductor allows the flow of current, while an insulator does not</p> Signup and view all the answers

    What is required to build a simple circuit?

    <p>A battery, a switch, a wire, and a light bulb</p> Signup and view all the answers

    What is the characteristic of a parallel circuit?

    <p>Components are connected across common points</p> Signup and view all the answers

    What happens when you close the switch in a simple circuit?

    <p>The circuit becomes closed</p> Signup and view all the answers

    Which of the following is NOT a type of component in an electric circuit?

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

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

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

    What type of energy is converted by a load in an electric circuit?

    <p>Electrical energy into thermal energy</p> Signup and view all the answers

    What is necessary for an electric current to flow through a circuit?

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

    What happens when a source of energy is connected to a circuit?

    <p>The electrons move in the same general direction</p> Signup and view all the answers

    What is a characteristic of delocalized electrons?

    <p>They are free to move within the metal</p> Signup and view all the answers

    What is the purpose of a terminal in an electric circuit?

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

    What is the result of having multiple components in a circuit?

    <p>The circuit becomes more complex</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 purpose of the light bulb in a simple 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 a characteristic of a series circuit?

    <p>If one component fails, the entire circuit is broken</p> Signup and view all the answers

    What is necessary to build a simple circuit?

    <p>A wire, a battery, and a light bulb</p> Signup and view all the answers

    What is the result of a closed circuit?

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

    What is the purpose of the wires in a simple circuit?

    <p>To connect the components together</p> Signup and view all the answers

    What is the characteristic of a parallel circuit?

    <p>Multiple paths for the current to flow</p> Signup and view all the answers

    What is the primary function of a delocalized electron in a metal?

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

    What is the purpose of a conductor in an electric circuit?

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

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

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

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

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

    What is necessary for an electric current to flow through a circuit?

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

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

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

    What type of pathway is necessary for an electric current to flow?

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

    What is the result of connecting a source of energy to a circuit?

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

    What is the primary characteristic of a material that allows it to be used as a conductor in an electric circuit?

    <p>It has a low resistance to electric current</p> Signup and view all the answers

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

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

    What happens to the current in a circuit when the switch is closed?

    <p>The current starts flowing</p> Signup and view all the answers

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

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

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

    <p>The current stops flowing</p> Signup and view all the answers

    What is the primary function of the wires in a simple circuit?

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

    What is the characteristic of a conductor that allows it to be used in a circuit?

    <p>Low resistance to electric current</p> Signup and view all the answers

    What happens when a component fails in a parallel circuit?

    <p>The current can still flow through the other paths</p> Signup and view all the answers

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