Choose a circuit mode, then vary V or R values and click Capture. Compare how total resistance and current change across Series / Parallel / Mixed configurations.
Recorded Data
Mode
V (V)
R_t (Ω)
I (A)
P (W)
Adjust parameters then click Capture
I vs V (Ohm's Law)
Record 2+ points to see graph
What To Explore
Series vs Parallel — compare R_total for same R1/R2/R3. Which gives lower resistance?
Double V (voltage) — does current double? Verify V = IR linearity.
Increase R1 in mixed mode — observe how it affects R2 and R3 branch currents.
EQUATION LAB — Ohm's Law & Resistor Networks
Symbols
VVoltage across resistor (Volts)
ICurrent through resistor (Amperes)
RResistance (Ohms, Ω)
R_tTotal equivalent resistance
PPower dissipated (Watts)
Laws
Ohm's Law
Current through a conductor is directly proportional to voltage and inversely proportional to resistance. The slope of the V-I graph gives resistance R.
Series Circuit
Resistors in series share the same current. Total resistance is the sum. Voltage divides across resistors proportionally: V_k = I · R_k.
Parallel Circuit
Resistors in parallel share the same voltage. Total resistance is always less than the smallest branch. Each branch current: I_k = V / R_k.
Power Dissipation
Power converted to heat in each resistor. Higher resistance or higher current both increase heat. This is Joule heating.