The V-I curve, or voltage-current curve, is a graphical representation of the relationship between the voltage and the current in a circuit or device. It is typically plotted on a graph with voltage on the y-axis and current on the x-axis. The shape of the curve can provide important information about the characteristics of the circuit or device. For example, a linear V-I curve indicates that the device has a constant resistance, while a non-linear curve indicates that the resistance varies with the current. The V-I curve is often used to analyze and design electrical circuits and devices, and to predict their behavior under different operating conditions.
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