Ch 30,31,32,33 Phys 232 Question and
answers already passed 2025/2026
Mutual inductance - correct answer ✔A changing current in one coil induces a current in a neighboring
coil
Potential Across an Inductor - correct answer ✔The potential across an inductor depends on the rate of
change of the current through it.
The self-induced emf does not oppose current, but opposes a change in the current
Magnetic field Energy - correct answer ✔The energy stored in an inductor is U=1/2LI^2
The energy density in a magnetic field is u= B^2/2mueknot
The L-C Circuit - correct answer ✔An L-C circuit contains an inductor and a capacitor and is an
oscillating circuit.
The switch S was at position A for a long time when it is switched to B. Describe the current flow in the
right loop. Assume that the inductor and the wires have zero resistnace. - correct answer ✔The current
flows in a sinusoidal function with frequency w=1/sqrt(LC)
Time constant - correct answer ✔The time constant for an R-L circuit is T=L/R
RMS - correct answer ✔The rms value is the average of the square of the function over an entire cycle
As the frequency in this simple ac circuit increases, while the rms voltage is held constant, the rms
current through the resistor. - correct answer ✔does not change
answers already passed 2025/2026
Mutual inductance - correct answer ✔A changing current in one coil induces a current in a neighboring
coil
Potential Across an Inductor - correct answer ✔The potential across an inductor depends on the rate of
change of the current through it.
The self-induced emf does not oppose current, but opposes a change in the current
Magnetic field Energy - correct answer ✔The energy stored in an inductor is U=1/2LI^2
The energy density in a magnetic field is u= B^2/2mueknot
The L-C Circuit - correct answer ✔An L-C circuit contains an inductor and a capacitor and is an
oscillating circuit.
The switch S was at position A for a long time when it is switched to B. Describe the current flow in the
right loop. Assume that the inductor and the wires have zero resistnace. - correct answer ✔The current
flows in a sinusoidal function with frequency w=1/sqrt(LC)
Time constant - correct answer ✔The time constant for an R-L circuit is T=L/R
RMS - correct answer ✔The rms value is the average of the square of the function over an entire cycle
As the frequency in this simple ac circuit increases, while the rms voltage is held constant, the rms
current through the resistor. - correct answer ✔does not change
