Coulomb's Law and Capacitor Calculator

Energy changes shape on every hill

Forces spread through strong shapes

Tiny time differences become a map position

Orbit is falling without hitting the ground

Calculate trajectory, range, max height, and time of flight for projectile motion. Visualize the parabolic path with an interactive time slider and velocity vectors.

Calculate voltage, current, resistance, and power with Ohm's law. Build series and parallel resistor networks with step-by-step equivalent resistance.

Visualize image formation with interactive ray diagrams for lenses and mirrors.

Solve constant-acceleration problems with step-by-step solutions and motion graphs.

Place point charges, probe electric potential and field at any location, and visualize equipotential contour lines and field arrows. Verify E = -dV/dr for dipole, quadrupole, and parallel plate configurations

Apply Gauss's law to point charges, line charges, infinite planes, spheres, and cylinders. Visualize Gaussian surfaces, plot E(r), and explore how enclosed charge determines flux

Investigate how a capacitor charges and discharges through a resistor. Adjust resistance, capacitance, and source voltage with sliders. Plot V(t) and I(t) on a dual-axis chart with vertical markers at the time constant tau and at 5 tau. Compute charge stored Q = CV, energy U = 0.5 C V squared, and time to reach 90% of final voltage. Three guided experiments cover verifying tau = RC, energy stored vs voltage, and charge-discharge symmetry. Hypothesis, data table, and conclusions workflow with CSV and PDF export.

Explore capacitor charging/discharging and inductor energizing/de-energizing with oscilloscope-style plots. Measure time constants, verify exponential models, and use semilog analysis to extract experimental values of τ

Build understanding from Coulomb's law through circuits, fields, and electromagnetic induction - the core of AP Physics 2.