True or False: All gaseous conductive lamps exhibit a positive-resistance characteristic.

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Gaseous conductive lamps can display a variety of resistance characteristics depending on their design and operating conditions. Unlike incandescent lamps that typically exhibit a purely resistive load, gaseous lamps, such as neon or fluorescent types, can have non-linear and complex behavior in terms of their resistance.

For instance, when a gaseous lamp is first energized, it might initially present a high resistance while the gas ionizes, leading to a low current flow. Once the gas is ionized and the lamp is fully operational, the resistance drops significantly, indicating a negative resistance region, where an increase in voltage can lead to a decrease in current. This characteristic means that not all gaseous conductive lamps demonstrate a simple positive resistance behavior throughout their operation.

Hence, stating that all gaseous conductive lamps exhibit a positive-resistance characteristic is false. The behavior can vary based on factors such as gas type, lamp design, and specific conditions under which the lamp operates.