Dinglo Open Physics Lab Ohm's Law Circuit Voltage · resistance · current
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Simulator ready Experiment 05 / Electricity Model Ideal DC Closed circuit
Interactive electricity laboratory

Observe Ohm's law in a complete circuit.

Set voltage and current independently, then watch resistance, power, the circuit meters, and the graph rebalance through Ohm's law.

APPARATUS / 01

Series DC circuit

Battery, switch, ammeter and resistor in series. Voltmeter in parallel.

Current flowing
V
Source voltage9.0V
R
Calculated resistance330Ω
I
Circuit current27.3mA
P
Load power245mW
DC CIRCUIT BENCHCONVENTIONAL CURRENT →
Interactive Ohm's law series circuit A DC voltage source, switch, ammeter and resistor are wired in series. A voltmeter is wired in parallel across the resistor. Moving charge markers indicate current when the switch is closed. DC SOURCE + − 9.0 V SWITCH CLOSED AMMETER A 27.3 mA LOAD RESISTOR 330 Ω VOLTMETER V 9.0 V
conductor charge marker measuring device resistive load
Observation Current setpoint is independent of voltage
IDEAL COMPONENTS
ANALYSIS / 02

Voltage–current characteristic

The line shows the resistance implied by your selected voltage and current operating point.

slope = 1 / 330 Ω
theoretical response current operating point I = V / 330 Ω
CURRENT OBSERVATION

Ohm's law is in balance

9.0 volts across 330 ohms produces 27.3 mA of current.

RELATIONSHIPV = I × R
EXPERIMENT NOTEBOOK / 04

Record and compare measurements

Capture up to eight operating points. Vary voltage while current stays fixed and compare the calculated resistance.

TrialVoltageResistanceCurrentPowerCircuit
No observations recorded. Configure the circuit, then select “Record reading”.
THEORY / 05

One law, three arrangements

Choose the form that isolates the quantity you need. Use amperes, volts and ohms for SI calculations.

Find voltageV = I × R
Find currentI = V ÷ R
Find resistanceR = V ÷ I
GUIDED INVESTIGATION

Predict before you adjust

  1. 01

    Double voltage. Keep the current setpoint fixed; the required resistance should double.

  2. 02

    Double current. Keep voltage fixed; the calculated resistance should halve.

  3. 03

    Open the switch. A broken path makes measured current zero.