Which parameter of an AC source in Simulink determines the frequency of the voltage waveform?
Think about what controls how fast the voltage changes over time.
The frequency parameter sets how many cycles per second the AC voltage completes, defining the waveform's speed.
Given a Simulink model with a resistive load of 10 ohms connected to an AC source of 120 V RMS at 60 Hz, what is the expected RMS current through the load?
Use Ohm's law: Current = Voltage / Resistance.
For RMS values in a purely resistive AC circuit, I_RMS = V_RMS / R = 120 / 10 = 12 A.
In a Simulink simulation, an AC source supplies a load with voltage waveform V(t) = 170*sin(377t) volts and current waveform I(t) = 5*sin(377t - π/6) amps. What is the average real power consumed by the load?
Calculate RMS values and use P = Vrms * Irms * cos(phase difference).
Vrms = 170 / √2 ≈ 120 V, Irms = 5 / √2 ≈ 3.54 A, phase difference = π/6 radians (30°), cos(30°) ≈ 0.866. Power = 120 * 3.54 * 0.866 ≈ 368 W.
A Simulink model of an AC source connected to a load shows zero current output despite a non-zero voltage. Which of the following is the most likely cause?
Think about what would cause no current flow despite voltage presence.
If the load is disconnected, no current flows even if voltage is present. Other options would cause different effects.
In Simulink, you want to model a non-linear load whose current depends on the square of the voltage magnitude. Which approach best represents this behavior?
Think about how to make current depend on voltage squared in the model.
A controlled current source that takes voltage squared as input can model non-linear current behavior dependent on voltage magnitude squared.