To decrease the measured resistance between the MT1 and MT2 terminals of a TRIAC, which terminals should be connected?

To decrease the measured resistance between the MT1 and MT2 terminals of a TRIAC, connecting the Gate to MT2 is the correct approach. This is because a TRIAC is a semiconductor device that can control power. The operation of a TRIAC allows current to flow between the MT1 and MT2 terminals when it is triggered by a small current applied to the Gate terminal.

When the Gate is connected to MT2, it effectively allows the gate current to flow, which, in turn, causes the TRIAC to become conductive between MT1 and MT2. This conduction significantly reduces the resistance measured between these two terminals.

In contrast, other connections, such as those between MT1 and Gate or jumping MT1 to MT2 directly, do not achieve the desired effect of decreasing the resistance measurement in the same manner. The function of the Gate is crucial, as it is specifically designed to control the conductance of the MT1-MT2 path. Thus, connecting the Gate to MT2 is the most effective means to activate the TRIAC and reduce resistance.