Gr 11 Physical Sciences: Ch 9.1 Ohm’s Law
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Questions and Answers

What is the characteristic of the graph of current vs. voltage for ohmic conductors?

  • A straight line (correct)
  • A parabolic line
  • A curved line
  • A zigzag line

What happens to the resistance of non-ohmic conductors when the temperature changes?

  • It changes randomly
  • It decreases
  • It increases (correct)
  • It remains the same

In a series circuit, what is the relationship between the total resistance and the resistances of individual resistors?

  • Rs = R1 × R2 × R3 × ... × Rn
  • Rs = R1 + R2 + R3 + ... + Rn (correct)
  • Rs = R1 / (R2 + R3 + ... + Rn)
  • Rs = R1 - R2 + R3 - ... + Rn

What is the same for all components in a series circuit?

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

How is the total resistance in a parallel circuit calculated?

<p>1/Rp = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn (C)</p> Signup and view all the answers

What is the same for all components in a parallel circuit?

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

How is the total current in a parallel circuit calculated?

<p>I = I1 + I2 + I3 + ... + In (B)</p> Signup and view all the answers

What is the correct order of operations when analyzing a circuit with multiple series and parallel components?

<p>Calculate the total resistance of each parallel portion, then add them in series (A)</p> Signup and view all the answers

What is the unit of measurement for the amount of energy per unit charge?

<p>Joule per Coulomb (C)</p> Signup and view all the answers

What is the relationship between current, voltage, and resistance in a circuit according to Ohm's Law?

<p>I = V/R (C)</p> Signup and view all the answers

What happens to the resistance of an ohmic conductor when the voltage is varied across it?

<p>It remains constant (B)</p> Signup and view all the answers

What is the graph that results from plotting voltage on the x-axis and current on the y-axis?

<p>A straight-line graph (C)</p> Signup and view all the answers

What is an example of a non-ohmic conductor?

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

What is the definition of electrical current?

<p>The rate of flow of charge through a circuit (B)</p> Signup and view all the answers

What happens to the resistance of a conductor when its temperature changes?

<p>It changes for non-ohmic conductors (D)</p> Signup and view all the answers

What is the formula for calculating resistance?

<p>R = I/V (D)</p> Signup and view all the answers

What is the fundamental quantity that Ohm's Law relates?

<p>Current, voltage, and resistance (A)</p> Signup and view all the answers

What is the condition for the resistance of a conductor to be constant?

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

What type of conductor does not obey Ohm's Law?

<p>Non-ohmic conductor (D)</p> Signup and view all the answers

What is the effect of increasing the voltage across an ohmic conductor?

<p>The current flowing through the conductor increases (B)</p> Signup and view all the answers

What is the formula that describes the relationship between current, voltage, and resistance in a circuit?

<p>I = V/R (C)</p> Signup and view all the answers

What is the definition of resistance in a circuit?

<p>A measure of how hard it is to push current through a circuit element (D)</p> Signup and view all the answers

What is the characteristic of ohmic conductors?

<p>Their resistance remains constant with varying voltage (C)</p> Signup and view all the answers

What is an example of an ohmic conductor?

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

What is the main difference between ohmic and non-ohmic conductors?

<p>Ohmic conductors have a constant resistance, while non-ohmic conductors have a varying resistance (D)</p> Signup and view all the answers

What is the total resistance in a circuit with three resistors in parallel, each with a resistance of 2 ohms, 3 ohms, and 4 ohms?

<p>12/7 ohms (C)</p> Signup and view all the answers

In a series circuit with two resistors, what is the relationship between the voltage across each resistor and its resistance?

<p>The voltage across each resistor is directly proportional to its resistance (C)</p> Signup and view all the answers

What is the current through each component in a series circuit?

<p>The same for all components (B)</p> Signup and view all the answers

How do you analyze a circuit with multiple series and parallel components?

<p>Calculate the total resistance of each parallel portion first, then add up these resistances in series (C)</p> Signup and view all the answers

What is the formula for the total resistance in a series circuit with n resistors?

<p>R_s = R_1 + R_2 + ... + R_n (D)</p> Signup and view all the answers

What is the current through each parallel path in a parallel circuit?

<p>Different for each path (A)</p> Signup and view all the answers

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

<p>The same for all components (A)</p> Signup and view all the answers

What is the primary reason why the resistance of an ohmic conductor remains constant?

<p>The temperature of the conductor is constant (A)</p> Signup and view all the answers

What is the relationship between the voltage and current in a non-ohmic conductor?

<p>There is no definite relationship between the voltage and current (A)</p> Signup and view all the answers

What is the unit of measurement for the rate of flow of charge through a circuit?

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

Which of the following is NOT a characteristic of ohmic conductors?

<p>The conductor is made of a specific material (C)</p> Signup and view all the answers

What is the physical quantity that is measured by the voltage across a conductor?

<p>The energy per unit charge (D)</p> Signup and view all the answers

What is the condition for the current flowing through a conductor to be proportional to the voltage across it?

<p>The conductor is at a constant temperature (C)</p> Signup and view all the answers

What is the relationship between the voltage and current in a circuit according to Ohm's Law?

<p>The current is proportional to the voltage and inversely proportional to the resistance (D)</p> Signup and view all the answers

What is the difference between ohmic and non-ohmic conductors?

<p>Ohmic conductors have a constant resistance, while non-ohmic conductors have a variable resistance (D)</p> Signup and view all the answers

What is the primary difference between the total resistance in a series circuit and a parallel circuit?

<p>The total resistance in a series circuit is the sum of the individual resistances, while in a parallel circuit, it is the reciprocal of the sum of the reciprocals of individual resistances. (B)</p> Signup and view all the answers

In a circuit with two resistors in series and one resistor in parallel, what is the correct order of operations to calculate the total resistance?

<p>Calculate the total resistance of the series resistors first, then calculate the total resistance of the parallel resistor and the series resistors combined. (B)</p> Signup and view all the answers

What is the relationship between the voltage across each resistor and its resistance in a series circuit?

<p>The voltage across each resistor is directly proportional to its resistance. (A)</p> Signup and view all the answers

What is the primary advantage of using parallel circuits over series circuits?

<p>Parallel circuits provide multiple paths for current to flow, reducing the risk of circuit failure. (D)</p> Signup and view all the answers

What is the consequence of combining multiple resistors in series?

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

What is the characteristic of the graph of current vs. voltage for non-ohmic conductors?

<p>The graph is a curve. (A)</p> Signup and view all the answers

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

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

What is the condition for a conductor to be classified as ohmic?

<p>The conductor's resistance is constant regardless of voltage. (D)</p> Signup and view all the answers

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