A light-emitting diode has the property that the potential difference between its ends is approximately $1.5 \mathrm{~V}$ when it conducts currents ranging from $1 \mathrm{~mA}$ to $50 \mathrm{~mA}$. This device is ohmic.

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Quizplus · Accepted Answer

An ohmic device is one whose resistance remains constant as the current through it changes, meaning its I-V (current-voltage) characteristic is linear. A light-emitting diode (LED) does not exhibit this behavior; its I-V relationship is non-linear, as it only begins to conduct significantly above a certain threshold voltage and its resistance can change with current.

A Light-Emitting Diode Has the Property That the Potential Difference 1.5 V1.5 \mathrm{~V}1.5 V

A Light-Emitting Diode Has the Property That the Potential Difference $1.5 \mathrm{~V}$