Gr 10 Physical Sciences Ch 13: Parallel resistors
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Questions and Answers

What is a key characteristic of parallel circuits?

  • Total current is zero
  • Multiple paths for current (correct)
  • Different voltage across each resistor
  • Increased total resistance

What is the voltage across each resistor in a parallel circuit?

  • Zero voltage
  • The same as the voltage across the battery (correct)
  • Dependent on the resistance of each resistor
  • Half of the total voltage

What happens to the total resistance in a parallel circuit?

  • It increases with the addition of more resistors
  • It decreases with the addition of more resistors (correct)
  • It becomes infinite
  • It remains the same

How does the current behave in a parallel circuit?

<p>It splits among the different paths (C)</p> Signup and view all the answers

What is the formula for calculating the total resistance in a parallel circuit?

<p>1/Rp = 1/R1 + 1/R2 + ... + 1/Rn (B)</p> Signup and view all the answers

What is the total current in a parallel circuit?

<p>The sum of the currents through each parallel branch (B)</p> Signup and view all the answers

Why do parallel circuits have multiple paths for current?

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

What is the relationship between the voltage across each resistor and the voltage across the battery in a parallel circuit?

<p>The voltage across each resistor is the same as the battery voltage (D)</p> Signup and view all the answers

What determines the portion of the total current that each path carries in a parallel circuit?

<p>The resistance of each path (D)</p> Signup and view all the answers

In a parallel circuit, what is the relationship between the total current and the currents through each branch?

<p>The total current is the sum of the currents through each branch (B)</p> Signup and view all the answers

What is the advantage of having multiple paths for current in a parallel circuit?

<p>It allows the current to split across the different paths (B)</p> Signup and view all the answers

What is the consequence of connecting resistors in parallel on the total resistance?

<p>The total resistance decreases (B)</p> Signup and view all the answers

What is the voltage across each resistor in a parallel circuit with three resistors connected to a battery with voltage V?

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

What is the reason why the voltage across each resistor is the same in a parallel circuit?

<p>The start and end points for all the resistors are the same (A)</p> Signup and view all the answers

What happens to the current through each resistor when more resistors are added in parallel?

<p>The current through each resistor decreases (A)</p> Signup and view all the answers

Why is the total resistance in a parallel circuit less than the resistance of the smallest individual resistor?

<p>Because the current is divided among the resistors (D)</p> Signup and view all the answers

What is the main reason why the total current in a parallel circuit splits across different paths?

<p>Because there are multiple paths for current to flow (C)</p> Signup and view all the answers

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

<p>The total current is the sum of the currents through each branch (B)</p> Signup and view all the answers

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

<p>The total resistance decreases (D)</p> Signup and view all the answers

What is the significance of the voltage being the same across each resistor in a parallel circuit?

<p>It allows the resistors to have different values of resistance (C)</p> Signup and view all the answers

What determines the portion of the total current that each path carries in a parallel circuit?

<p>The resistance of each resistor (B)</p> Signup and view all the answers

What is the consequence of having multiple paths for current in a parallel circuit?

<p>The total current is divided among the paths (B)</p> Signup and view all the answers

Why is the total resistance in a parallel circuit less than the resistance of the smallest individual resistor?

<p>Because the reciprocal of the total resistance is the sum of the reciprocals of the individual resistances (D)</p> Signup and view all the answers

What is the advantage of connecting resistors in parallel?

<p>It allows for more flexible circuit design (B)</p> Signup and view all the answers

What is the primary reason why the total current in a parallel circuit is divided among the different paths?

<p>Because each path has a different resistance (C)</p> Signup and view all the answers

What is the relationship between the total current and the currents through each branch in a parallel circuit when the resistors are identical?

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

What happens to the total resistance when the number of resistors in a parallel circuit is increased?

<p>It decreases in proportion to the number of resistors (D)</p> Signup and view all the answers

What is the condition necessary for the voltage across each resistor to be the same in a parallel circuit?

<p>The start and end points of all the resistors must be the same (C)</p> Signup and view all the answers

What is the effect of increasing the voltage supplied by the battery on the total current in a parallel circuit?

<p>The total current increases proportionally to the voltage (B)</p> Signup and view all the answers

What is the relationship between the resistance of each resistor and the total resistance in a parallel circuit?

<p>The total resistance is less than the resistance of the smallest individual resistor (D)</p> Signup and view all the answers

What is the advantage of connecting resistors in parallel in terms of current?

<p>The total current is increased (B)</p> Signup and view all the answers

What is the formula for calculating the total resistance in a parallel circuit?

<p>1/R_P = 1/R_1 + 1/R_2 + ... + 1/R_n (A)</p> Signup and view all the answers

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