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Current (A)
Resistance (Ω)
Voltage (V)
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Understanding Ohm's Law
Ohm's Law describes the relationship between voltage, current, and resistance in an electrical circuit:
- V = I × R - Voltage equals Current times Resistance
- I = V ÷ R - Current equals Voltage divided by Resistance
- R = V ÷ I - Resistance equals Voltage divided by Current
In Solar Systems
Understanding Ohm's Law helps you:
- Size wiring correctly - Calculate voltage drop in long wire runs
- Troubleshoot problems - Identify high-resistance connections
- Design circuits - Choose appropriate components for your system
- Measure safely - Understand how meters work with your system
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