MATLABTECH
Interactive Module

Mastering Ohm’s Law

Visualize the fundamental relationship between Voltage, Current, and Resistance. Explore how these principles apply to real-world components like resistors, capacitors, and inductors.

Water Analogy: Voltage, Current, and Resistance

Compare hydrostatic pressure in water tanks to electrical voltage in a circuit.

Mechanical (Water) System
Pressure Diff (ΔP)
60
Flow Rate (Q)
12.0
Pipe Constriction
High
Electrical Circuit Equivalent
Voltage (V)
60 V
Current (I)
12.0 A
Resistance (R)
5 Ω
Key Concepts:
Voltage (V) = Difference in water levels (Pressure). Higher difference means more push.
Resistance (R) = The constriction in the pipe. A narrower pipe (higher R) resists flow.
Current (I) = The resulting flow of water (electrons). Calculated as I = V / R.

Resistor Working Principle

Observe how voltage and current are perfectly in phase (I = V/R), and how energy is dissipated as heat (P = V·I).

Circuit & Heat Dissipation
Voltage (V)
0.00 V
Current (I)
0.00 A
Power / Heat (P)
0.00 W
Time Domain Waveforms
Heat Dissipation   |   Current Flow
Unlike Inductors or Capacitors, a pure resistor has no reactive delay. Voltage and Current cross zero at the exact same time.

Inductor Working Principle

Observe the creation of a magnetic field and the induced potential difference (V = L·di/dt) resisting current changes.

Circuit & Magnetic Field
Actual Current (I)
0.00 A
Induced Voltage (V)
0.00 V
Time Domain Waveforms
Magnetic Field   |   Current Flow
In DC mode, voltage only appears when the current is increasing or decreasing. In AC, voltage leads the current by 90°.

Capacitor Working Principle

Observe charge buildup, electric field creation, and the current flow required to change the voltage (I = C·dV/dt).

Circuit & Electric Field
Applied Voltage (V)
0.00 V
Current (I)
0.00 A
Time Domain Waveforms
Electric Field   |   Charge Flow
In DC mode, current only flows while the capacitor is charging or discharging. In AC, current leads voltage by 90°.

RLC Series Circuit Simulator

Interactive visualization of Resistor, Inductor, and Capacitor active/reactive dynamics.

Circuit Controls & Live Simulation

10 V
0.35 Hz
5 Ω
1.0 H
0.2 F
Current (I)
0.00 A
Total V
0.00 V
V_Resistor
0.00 V
V_Inductor
0.00 V
V_Capacitor
0.00 V

Time Domain Waveforms

Total Voltage (V)
Current (I)

Phasor Diagram (Active & Reactive)

Ref Current
Total V
V_R
V_L
V_C

Additional Resources: Ohm's Law & Circuit Foundations

🌐 1. Web Articles & Tutorials

📄 2. Research Papers (IEEE / ScienceDirect)