Ohm law worksheet

Use a stated pair of voltage, current and resistance to calculate ideal DC resistance relations and power.

Your input

Outputs are cleared when the input changes.

Result

Enter your data or use the example, then run the tool.

Worked example

12 V across 6 Ω gives 2 A and 24 W.

0 V across 6 Ω gives 0 A and 0 W. With voltage/current mode, zero current cannot determine a finite positive resistance.

Method

Use V=IR with the chosen known pair, then P=VI. Show the substituted numerical relation.

Resistance must be positive. Zero divisors and inconsistent passive-resistor sign combinations are rejected.

Limits

Finite SI input values only. The unused third field is ignored and may be replaced by the computed result.

No AC phase, reactive impedance, nonlinear components, temperature model or electrical-safety certification.

Sources

OpenStax: Ohm law

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