8. Basic Concepts
8.1 Ohm's Law
It is a law that illustrates the relationship between the voltage, the current, and the resistance.
𝑉 = 𝐼 · 𝑅
𝑅 =
𝑉
𝐼
𝐼 =
𝑉
𝑅
I is the current through the resistor.
V is the voltage around the resistor.
R is the resistance.
8.1.1 Example
Calculate the current in this circuit.
Simply, we can use Ohm’s law:
𝐼 =
𝑉
𝑅
3 𝑉
510 Ω
= 0. 00588 𝐴 = 5. 88 𝑚𝐴
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Mastering the Art of Measurement (DM401B Smart Digital Multimeter) r.01 www.plusivo.com