A common nominal value of 1000Ω for a thermistor is specified at which temperature?

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Multiple Choice

A common nominal value of 1000Ω for a thermistor is specified at which temperature?

Explanation:
Thermistors have a resistance that changes with temperature, and the “nominal” value is the resistance assigned at a specific reference temperature to serve as a baseline. For many common thermistors, that nominal resistance of 1000 ohms is specified at room temperature around 70°F (about 21°C). So the expected baseline is R = 1000 Ω at 70°F, and as temperature moves away from that reference, the resistance changes accordingly (decreasing for an NTC as temperature rises, increasing as temperature falls). The other options either give a different resistance at the same reference or specify a different reference temperature, which is not how the nominal value is defined.

Thermistors have a resistance that changes with temperature, and the “nominal” value is the resistance assigned at a specific reference temperature to serve as a baseline. For many common thermistors, that nominal resistance of 1000 ohms is specified at room temperature around 70°F (about 21°C). So the expected baseline is R = 1000 Ω at 70°F, and as temperature moves away from that reference, the resistance changes accordingly (decreasing for an NTC as temperature rises, increasing as temperature falls). The other options either give a different resistance at the same reference or specify a different reference temperature, which is not how the nominal value is defined.

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