(A resistor, the English name resistance, usually abbreviated as R, is a bottom property of the conductor and is related to the standard, material and temperature of the conductor. Ohm's law says, I=U/R, then R=U/I, the underlying unit of resistance is ohm, which is represented by the Greek letter "Ω", there is such a definition: when a voltage of one volt is applied to a conductor, a current of one ampere will be generated The corresponding resistance value)
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