Negative resistance is a phenomenon where an increase in voltage across a device results in a decrease in current through it, which is contrary to the behavior of most passive electrical components, such as resistors, where current increases with an increase in voltage. This unusual behavior can lead to amplification and oscillation effects, making negative resistance a useful property in certain electronic applications. There are two types of negative resistance: 1. **Dynamic Negative Resistance**: This occurs in certain nonlinear devices at specific operating points.
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