Gr 9 NATURAL SCIENCES: CH 3.4 Series and Parallel Circuits
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Questions and Answers

What happens to the total voltage when cells are connected in series?

  • It decreases
  • It remains the same
  • It increases (correct)
  • It becomes zero

    • What is a characteristic of an ammeter?

  • It is used to measure voltage
  • It has a very small resistance (correct)
  • It affects the current it is measuring
  • It has a high resistance

    • What happens to the total resistance when resistors are added in series?

  • It increases (correct)
  • It remains the same
  • It decreases
  • It becomes zero

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

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

    What is the total potential difference across a series circuit?

    <p>The sum of the potential differences across each component</p> Signup and view all the answers

    In a series circuit with two equal resistors and a 9V battery, what is the voltage across each resistor?

    <p>4.5V</p> Signup and view all the answers

    If the total voltage of a battery is 9V and the voltage across one resistor is 4V, what is the voltage across another resistor?

    <p>5V</p> Signup and view all the answers

    What is the purpose of an ammeter in a circuit?

    <p>To measure the current</p> Signup and view all the answers

    What is the purpose of a voltmeter in an electric circuit?

    <p>To measure the potential difference between two points</p> Signup and view all the answers

    What happens to the electric current in a series circuit?

    <p>The same current flows through all the components</p> Signup and view all the answers

    How are resistors connected in a series circuit?

    <p>In series with each other</p> Signup and view all the answers

    What is the difference between potential difference and electric current?

    <p>Potential difference is the energy gained per charge, while electric current is the flow of electrons</p> Signup and view all the answers

    What is the purpose of an ammeter in an electric circuit?

    <p>To measure the total current flowing through the circuit</p> Signup and view all the answers

    How is a voltmeter connected to measure the potential difference?

    <p>In parallel with the component</p> Signup and view all the answers

    What is the characteristic of a series circuit?

    <p>Only one path for electric current to flow</p> Signup and view all the answers

    What is the primary function of a voltmeter in an electric circuit?

    <p>To measure the potential difference between two points</p> Signup and view all the answers

    Why is it incorrect to connect a voltmeter in series with a component in a circuit?

    <p>Because it will not provide a meaningful reading</p> Signup and view all the answers

    What is the key characteristic of a series circuit?

    <p>The same current flows through all components</p> Signup and view all the answers

    What is measured by the difference in potential energy per charge between two points in an electric circuit?

    <p>Potential difference (voltage)</p> Signup and view all the answers

    What instrument is used to measure the total current flowing through a circuit?

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

    What is the purpose of an electric circuit?

    <p>To transmit energy from one point to another</p> Signup and view all the answers

    What is the number of paths available for electric current to move through in a series circuit?

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

    What is the effect on the total current when resistors are added in series?

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

    In a series circuit, what is the voltage across each component?

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

    What is the purpose of an ammeter in a circuit?

    <p>To measure the current</p> Signup and view all the answers

    What happens to the total voltage when cells are connected in series?

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

    In a series circuit, what is the relationship between the total current and the current through each component?

    <p>The total current is the same as the current through each component</p> Signup and view all the answers

    What is the characteristic of an ammeter?

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

    In a series circuit with two resistors and a 9V battery, what is the voltage across one resistor if the other resistor has 4V across it?

    <p>5V</p> Signup and view all the answers

    What is the effect on the total potential difference when cells are connected in series?

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

    What is the primary function of a potential difference in an electric circuit?

    <p>To measure the energy per charge between two points</p> Signup and view all the answers

    Why must an ammeter be connected in series in a circuit?

    <p>To measure the total current flowing through the circuit</p> Signup and view all the answers

    What would happen if a voltmeter is connected in series with a component in a circuit?

    <p>It would give an incorrect reading of the potential difference</p> Signup and view all the answers

    In a series circuit, what is the relationship between the current through each component?

    <p>The current through each component is the same</p> Signup and view all the answers

    What is the effect on the circuit if a voltmeter is connected in parallel with a component?

    <p>It would give a meaningful reading of the potential difference</p> Signup and view all the answers

    What is the function of a resistor in a series circuit?

    <p>To decrease the electric current through the circuit</p> Signup and view all the answers

    What is the number of paths available for electric current to move through in a series circuit?

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

    What is the primary reason for an ammeter to have a very small resistance?

    <p>To avoid affecting the current it is measuring</p> Signup and view all the answers

    When cells are connected in series, what is the total voltage of the battery?

    <p>The sum of the individual cell voltages</p> Signup and view all the answers

    What happens to the total current when resistors are added in series?

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

    In a series circuit, what is the relationship between the potential difference across each component and the total potential difference?

    <p>The potential difference across each component is less than the total potential difference</p> Signup and view all the answers

    In a series circuit with two equal resistors and a 9V battery, what is the total resistance?

    <p>Twice the value of one of the resistors</p> Signup and view all the answers

    What is the voltage across one resistor if the total voltage is 9V and the voltage across the other resistor is 4V?

    <p>5V</p> Signup and view all the answers

    Why is it important to connect an ammeter in parallel with a component in a circuit?

    <p>To avoid affecting the current it is measuring</p> Signup and view all the answers

    What happens to the voltage across each resistor if the resistors are not equal in a series circuit?

    <p>The voltage across each resistor is different</p> Signup and view all the answers

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