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

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

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

    How is the total current in a parallel circuit calculated?

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

    What is an example of a non-ohmic conductor?

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

    What is the definition of electrical current?

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

    What is the formula for calculating resistance?

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

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

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

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

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

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

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

    What is the characteristic of ohmic conductors?

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

    What is an example of an ohmic conductor?

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

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

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

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

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

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

    <p>The same for all components</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</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</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</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</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</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</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</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</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.</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.</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.</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.</p> Signup and view all the answers

    What is the consequence of combining multiple resistors in series?

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

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