Gr 8 Natural Sciences Ch 3.3: Parallel circuits
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Questions and Answers

What is a characteristic of a parallel circuit?

  • The total current supplied by the battery is less than the sum of the currents through each parallel branch.
  • The voltage across each component is different.
  • The current divides among the different branches of the circuit. (correct)
  • There is only one pathway for the electric current.

    • What happens to the total resistance of a parallel circuit when more resistors are added?

  • It remains the same.
  • It becomes infinite.
  • It increases.
  • It decreases. (correct)

    • What is true about the voltage across each component in a parallel circuit?

  • It is different for each component.
  • It is the same for each component. (correct)
  • It is infinite for each component.
  • It is zero for each component.

    • How do you identify a parallel circuit?

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

    What happens to the total current strength when more resistors are added in parallel?

    <p>It increases.</p> Signup and view all the answers

    What is true about adding cells in parallel?

    <p>The overall voltage of the circuit remains the same.</p> Signup and view all the answers

    What is the total current supplied by the battery in a parallel circuit?

    <p>Equal to the sum of the currents through each parallel branch.</p> Signup and view all the answers

    What happens to the current in each branch of a parallel circuit if the branches have identical components?

    <p>The current will divide equally among the branches.</p> Signup and view all the answers

    What is the primary advantage of connecting components in a parallel circuit?

    <p>To provide multiple pathways for the electric current</p> Signup and view all the answers

    In a parallel circuit with two identical light bulbs, what happens to the total current if one bulb is replaced with a bulb of twice the resistance?

    <p>The total current remains the same</p> Signup and view all the answers

    What is the relationship between the total current and the branch currents in a parallel circuit?

    <p>The total current is the sum of the branch currents</p> Signup and view all the answers

    Why do parallel circuits have multiple pathways for the electric current?

    <p>To provide redundancy in case one pathway fails</p> Signup and view all the answers

    What happens to the total current strength when multiple identical resistors are added in parallel?

    <p>It increases by 50%</p> Signup and view all the answers

    How do the currents through each branch of a parallel circuit compare if the branches have different resistances?

    <p>The currents are inversely proportional to the resistances</p> Signup and view all the answers

    What is the effect of adding more cells in parallel to a circuit?

    <p>The total voltage of the circuit remains the same</p> Signup and view all the answers

    Why are parallel circuits more reliable than series circuits?

    <p>Because they have more pathways for the electric current</p> Signup and view all the answers

    What is the primary reason for the total current supplied by the battery being equal to the sum of the currents through each parallel branch?

    <p>Because the current is distributed among the different branches of the circuit</p> Signup and view all the answers

    In a parallel circuit, what happens to the current strength through each branch if the total current supplied by the battery increases?

    <p>The current strength through each branch increases</p> Signup and view all the answers

    What is the effect of adding more identical resistors in parallel to a circuit?

    <p>The total resistance of the circuit decreases</p> Signup and view all the answers

    In a parallel circuit with two branches, what happens to the total current if one branch has a resistor with twice the resistance of the other branch?

    <p>The total current decreases</p> Signup and view all the answers

    Why do parallel circuits have multiple pathways for the electric current?

    <p>To allow the current to flow through multiple components</p> Signup and view all the answers

    In a parallel circuit, what happens to the voltage across each component if the total voltage supplied by the battery increases?

    <p>The voltage across each component remains the same</p> Signup and view all the answers

    What is the relationship between the total current and the branch currents in a parallel circuit?

    <p>The total current is equal to the sum of the branch currents</p> Signup and view all the answers

    Why are parallel circuits used in many electrical systems?

    <p>Because they are more reliable than series circuits</p> Signup and view all the answers

    What is the primary advantage of using parallel circuits in electrical systems?

    <p>Increased reliability and flexibility</p> Signup and view all the answers

    If two identical resistors are added in parallel to a circuit, what happens to the total current supplied by the battery?

    <p>It doubles</p> Signup and view all the answers

    In a parallel circuit with three branches, what is true about the currents through each branch?

    <p>The current is proportional to the resistance of each branch</p> Signup and view all the answers

    What happens to the voltage across each component in a parallel circuit if the total voltage supplied by the battery increases?

    <p>It remains the same</p> Signup and view all the answers

    Why do parallel circuits have multiple pathways for the electric current?

    <p>To provide multiple paths for the current to follow</p> Signup and view all the answers

    What is the relationship between the total current and the branch currents in a parallel circuit?

    <p>The total current is equal to the sum of the branch currents</p> Signup and view all the answers

    What happens to the total current strength if multiple identical resistors are added in parallel to a circuit?

    <p>It increases by a constant factor</p> Signup and view all the answers

    In a parallel circuit with two branches, what happens to the total current if one branch has a resistor with twice the resistance of the other branch?

    <p>The total current remains the same</p> Signup and view all the answers

    What is the primary advantage of using parallel circuits in electrical systems?

    <p>To provide multiple pathways for the electric current, increasing reliability</p> Signup and view all the answers

    What happens to the total current supplied by the battery when more resistors are added in parallel to a circuit?

    <p>It increases</p> Signup and view all the answers

    In a parallel circuit, what is true about the currents through each branch?

    <p>The current divides among the branches, but not equally</p> Signup and view all the answers

    What is the effect of adding more cells in parallel to a circuit?

    <p>The total voltage of the circuit remains the same</p> Signup and view all the answers

    In a parallel circuit, what happens to the current strength through each branch if the total current supplied by the battery increases?

    <p>It increases</p> Signup and view all the answers

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