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

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

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

What component of a circuit provides energy to the circuit?

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

What is the term for the 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 switch in a circuit?

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

What happens when a circuit is open?

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

What is a characteristic of a series circuit?

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

What happens when one component fails in a series circuit?

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

What is a characteristic of a parallel circuit?

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

What is the result of a closed circuit?

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

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

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

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

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

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

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

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

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

What is the characteristic of a parallel circuit?

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

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

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

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

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

What is a characteristic of delocalized electrons?

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

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

<p>The circuit becomes more complex (B)</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. (A)</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 (C)</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 (B)</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 (D)</p> Signup and view all the answers

What is necessary to build a simple circuit?

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

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

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

What is the characteristic of a parallel circuit?

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

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

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

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

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

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

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

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