Physics: Inductance and AC Circuits Quiz
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Questions and Answers

What happens to the potential V of a capacitor when connected to a battery?

  • It becomes zero
  • It remains the same (correct)
  • It decreases
  • It increases
  • How does the electric field E due to a plane sheet of charge change when the charge density σ decreases?

  • E remains constant
  • E increases
  • E decreases (correct)
  • E becomes zero
  • What happens to the energy stored in a capacitor when the charge Q decreases but the potential V remains constant?

  • Energy becomes zero
  • Energy stored decreases (correct)
  • Energy stored increases
  • Energy stored remains constant
  • In an electric circuit, what happens to the current distribution if I1 = 4I/7, I2 = I/7, and I3 = I/7?

    <p>I2 is equal to I3</p> Signup and view all the answers

    What is the relationship between charge Q and electric field E in a capacitor?

    <p>$E = \frac{Q}{C}$</p> Signup and view all the answers

    How does the energy stored in a capacitor change with both Q and V being proportional to it?

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

    What is the correct ratio of e1 to e2 in the given equation e1/e2 = L1/L2 = 3?

    <p>e1 = 3e2</p> Signup and view all the answers

    In circuit (ii), what happens to the glow of the bulb if ω is increased?

    <p>The bulb glows dimmer</p> Signup and view all the answers

    What effect does lowering ω have on the current flowing through the capacitor arm in circuit (i)?

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

    What happens to the energy stored in a coil when U1/U2 = 1/3?

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

    If Xc tends to infinity in circuit (i), what happens to Irms?

    <p>Irms tends to zero</p> Signup and view all the answers

    What conclusion can be drawn when ω approaches 0 in both circuits?

    <p>Bulbs glow brightly</p> Signup and view all the answers

    What is the potential drop V1 across the first cell in the circuit?

    <p>V1 = E - Ir1</p> Signup and view all the answers

    If R = r1 - r2, what does this imply regarding the potential drop across the cell E1 with internal resistance r1?

    <p>The potential drop will be zero.</p> Signup and view all the answers

    What happens to the voltmeter reading when connected across a 3000 ohm resistor, given that the voltmeter has a resistance of 6000 ohms?

    <p>The voltmeter reading will be half the actual voltage.</p> Signup and view all the answers

    How does the power across R2 change when its value is heated to 4 times its original value?

    <p>The power increases by a factor of 16.</p> Signup and view all the answers

    What is the relationship between Power1 and Power2 in the circuit when the switch is closed?

    <p>$Power1 &lt; Power2$</p> Signup and view all the answers

    What is the percentage difference in voltage read by the voltmeter compared to the actual voltage across a 3000 ohm resistor?

    <p>-16.6%</p> Signup and view all the answers

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