example 15M0 for three significant digits. When the value can be expressed without the need for a prefix (that is, multiplicator 1), an "R" is used instead of the decimal separator. For example, 1R2 indicates 1.2 ?, and 18R indicates 18 ?.

Theory of operation

Ohm's law

An ideal resistor (i.e. a resistance without reactance) obeys Ohm's law:

Ohm's law states that the voltage () across a

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