Electronics: RC Filters and Circuit Analysis
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Questions and Answers

What is the unit of measurement for the coefficient of self-inductance?

  • Henry (correct)
  • Ampere
  • Volt
  • Tesla
  • What is the symbol for the coefficient of self-inductance?

  • H
  • K
  • L (correct)
  • B
  • What happens to the current in the inductor when the regime becomes continuous?

  • It remains the same
  • It becomes zero (correct)
  • It increases
  • It decreases
  • What is the characteristic of an ideal inductor in the continuous regime?

    <p>uL = 0</p> Signup and view all the answers

    What is the direction of the induced electromotive force (e) in a coil?

    <p>In the opposite direction of the current</p> Signup and view all the answers

    What is the name of the scientist who the unit of self-inductance is named after?

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

    What is the relationship between the magnetic field created and the intensity of the current in an ideal coil?

    <p>The magnetic field is proportional to the intensity of the current</p> Signup and view all the answers

    What principle does an inductor respect, like a capacitor?

    <p>The principle of superposition</p> Signup and view all the answers

    What is the topic of Section 5.2?

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

    What is the diagram shown in Section 5.6?

    <p>Diagramme de Bode d’un filtre RC</p> Signup and view all the answers

    What is the order of the filter described in Section 5.11?

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

    What is the value of 𝐺0 in Section 5.8?

    <p>3,2</p> Signup and view all the answers

    What is the topic of Section 5.17?

    <p>Sélection de la seconde harmonique d’un signal périodique</p> Signup and view all the answers

    What is the value of 𝑄 in Section 5.16?

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

    What is the topic of Section 5.18?

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

    What is the topic of Section 5.4?

    <p>Types de filtre souvent rencontrés</p> Signup and view all the answers

    What is the equivalent resistance of two resistances in parallel?

    <p>R1R2 / (R1 + R2)</p> Signup and view all the answers

    What is the equivalent resistance of N identical resistances in parallel?

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

    What is the formula for the equivalent resistance of multiple resistances in parallel?

    <p>1 / R_eq = Σ(1 / R_k)</p> Signup and view all the answers

    What is the relationship between the resistances R1 and R2 when they are in series?

    <p>R1 + R2 = R_eq</p> Signup and view all the answers

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

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

    What is the purpose of a voltage divider?

    <p>To divide the voltage</p> Signup and view all the answers

    What is the formula for the equivalent resistance of two resistances in parallel in terms of R1 and R2?

    <p>R1R2 / (R1 + R2)</p> Signup and view all the answers

    What is the advantage of connecting resistances in parallel?

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

    What is the term used to describe the situation where fluctuations of current propagate at a speed close to the speed of light?

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

    What is the approximation that allows us to neglect the propagation time 𝜏 in front of the characteristic time 𝑇 of the fluctuations?

    <p>Approximation des régimes quasi-stationnaires</p> Signup and view all the answers

    What is the condition for the laws of permanent regimes to remain valid in variable regimes?

    <p>If the propagation time 𝜏 is negligible</p> Signup and view all the answers

    What is a dipole in electrical circuits?

    <p>A part of a circuit that can be connected to the rest of the circuit by two wires</p> Signup and view all the answers

    What is the relationship between the current and voltage in a dipole, according to the receptor convention?

    <p>i = f(u) = V_A - V_B</p> Signup and view all the answers

    What is the relationship between the current and voltage in a dipole, according to the generator convention?

    <p>i = f(u) = V_B - V_A</p> Signup and view all the answers

    What is the characteristic of the current in a branch of a circuit at a given instant, in regime variable?

    <p>The current has the same intensity at every point</p> Signup and view all the answers

    What is the term used to describe the situation where the fluctuations of current do not propagate at a speed close to the speed of light?

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

    What is a fundamental property of any electrical circuit?

    <p>Auto-inductance</p> Signup and view all the answers

    What is the formula for the power received by a coil carrying an electric current?

    <p>P = ui</p> Signup and view all the answers

    What is the energy stored in an ideal coil?

    <p>W_B = 1/2 Li^2</p> Signup and view all the answers

    What happens to the energy stored in a coil when its power supply is cut off?

    <p>The energy is released</p> Signup and view all the answers

    Why does the energy stored in a coil not depend on the way the power supply is cut off?

    <p>Because the energy is stored magnetically</p> Signup and view all the answers

    What is the condition for the energy stored in a coil to change?

    <p>The current must vary continuously</p> Signup and view all the answers

    What is the relationship between the energy stored in a coil and the current flowing through it?

    <p>W_B = 1/2 Li^2</p> Signup and view all the answers

    What is the similarity between the energy stored in a coil and a capacitor?

    <p>Both cannot change energy abruptly</p> Signup and view all the answers

    Study Notes

    Electric Circuits

    • In electric circuits, the approximation of quasi-stationary regimes (ARQS) is used to neglect the time of propagation of current fluctuations in relation to the characteristic time of the signal.
    • The laws of permanent regimes remain valid in variable regimes if the propagation phenomena can be considered negligible.

    Dipole

    • A dipole is a part of a circuit that can be connected to the rest of the circuit by two wires.
    • The behavior of a dipole is described by its current-voltage relation (i = f(u)) in a specified convention.
    • There are two conventions: the receptor convention and the generator convention.

    Resistances

    • Two resistances in parallel are equivalent to a conductor with a resistance of R_eq = (R1*R2) / (R1 + R2).
    • N identical resistances in parallel are equivalent to a conductor with a resistance of R_eq = R/N.

    Inductance

    • The magnetic field created by a current is proportional to the intensity of the current (Biot and Savart's law).
    • The coefficient of self-inductance is denoted by L and is expressed in henries (H).
    • When the current varies over time, the inductor behaves like a source of electromotive force (e = -L(di/dt)).
    • The characteristic of an ideal inductor is u = L(di/dt) in the receptor convention.
    • In the steady-state regime, the characteristic of an ideal inductor becomes u = 0, and the inductor can be replaced by a perfect conductor.

    Energy Stored in an Inductor

    • The power received by an inductor is P = ui = L(di/dt)*i.
    • The energy stored in an ideal inductor is W_B = (1/2)Li^2, which is the energy that can be released when the power supply is cut off (i = 0).
    • This energy does not depend on the way the power supply is cut off, and it is said that an ideal inductor stores energy in the form of a magnetic field.

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    Description

    This quiz covers the fundamentals of electronic circuits, including quadripole circuits, RC filters, and their characteristics, such as bandwidth and Bode diagrams.

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