VisuApps
Grasp circuits, fields, alternating current and power interactively
Apps
Diode characteristic plus half-wave and bridge rectifier: an input sine becomes u_out across the load, smoothing capacitor switchable (ripple visible) — characteristic and time course side by side.
Electrical engineering fundamentalsTry it
Three-phase system L1/L2/L3 offset by 120°: three rotating phasors and sine curves, star vs. delta connection via pill-toggle, the line-to-phase voltage relation (√3 factor) and the rotating field.
Electrical engineering fundamentalsTry it
Point charges freely placeable and draggable: field lines, equipotential lines and a field-strength heatmap live; a draggable test charge shows the Coulomb force vector, with a cursor readout for E and potential.
Electrical engineering fundamentalsTry it
A magnet is moved through a coil: induced voltage U_ind = −N·dΦ/dt live as a plot, Lenz's rule in colour; in the second mode a rotating loop acts as a generator producing a sine voltage.
Electrical engineering fundamentalsTry it
A two-mesh network: the junction rule (ΣI = 0) at a node and the mesh rule (ΣU = 0) around a loop visualised in colour; component values via slider, the system is solved and branch currents and potentials shown live.
Electrical engineering fundamentalsTry it
A parallel-plate capacitor with visible charge build-up plus an RC circuit: charge/discharge curve U_C(t) = U(1−e^(−t/RC)) and I(t) animated live, time constant τ = RC marked; sliders for R, C and U.
Electrical engineering fundamentalsTry it
A current-carrying conductor with its ring-shaped B-field (right-hand rule) in 3D and a moving charge on a circular path due to the Lorentz force F = q·v×B — vectors v, B, F in colour, sliders for I, B and v.
Electrical engineering fundamentalsTry it
An interactive DC circuit with source, resistor, ammeter and voltmeter: set U and R, I = U/R live as flowing charge carriers; alongside, the U-I characteristic as a line through the origin with slope 1/R and a moving operating point.
Electrical engineering fundamentalsTry it
Pill-toggle series vs. parallel with up to three resistors: equivalent resistance (R = ΣR or 1/R = Σ1/R), current/voltage division live in the circuit with flowing charge carriers and a split table.
Electrical engineering fundamentalsTry it
RLC series resonant circuit: frequency response |Z|(ω) and current I(ω) with resonance at ω₀ = 1/√(LC); resonance curve with quality factor Q and bandwidth, a draggable frequency marker shows Z, I and φ at the point.
Electrical engineering fundamentalsTry it
Unloaded and loaded voltage divider: U_out = U·R2/(R1+R2), draggable wiper, load resistor switchable (shows the drop under load) — with a plot of U_out over wiper position.
Electrical engineering fundamentalsTry it
An iron core with primary and secondary windings and animated magnetic flux in 3D: turns ratio U₂/U₁ = N₂/N₁ = I₁/I₂; turns and primary voltage via slider, stepping up and down made visible.
Electrical engineering fundamentalsTry it
Sine voltage u(t) = û·sin(ωt+φ): amplitude, frequency and phase via slider, a rotating phasor couples to the unrolling sine curve; RMS value U_rms = û/√2, period T and peak-to-peak marked.
Electrical engineering fundamentalsTry it
Power triangle with apparent power S = U·I, real power P = U·I·cosφ and reactive power Q = U·I·sinφ; phase angle via slider, curves u(t), i(t), p(t) and reactive-power compensation via a switchable capacitor.
Electrical engineering fundamentalsTry it
Complex AC analysis of the RLC series circuit: Z = R + j(ωL − 1/ωC); the voltage phasors U_R, U_L, U_C add up to the total voltage, phase angle φ and |Z| live, alongside u(t) and i(t) with their phase shift.
Electrical engineering fundamentalsTry itWant to use these apps in your courses? Let’s find out what works for you.
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