With a change in temperature, a thermistor will change which electrical property?

With a change in temperature, a thermistor will change which electrical property?

• A. Impedance
• B. Voltage
• C. Current
• D. Resistance

Answer: (D)

A thermistor is a temperature-dependent resistor, so the property that changes with temperature is its resistance. As temperature rises, an NTC thermistor’s resistance decreases, while a PTC thermistor’s resistance increases. This happens because the semiconductor material in the thermistor changes how easily charge carriers can move as temperature changes. In a DC circuit, this changing resistance alters current according to Ohm’s law (V = I·R). Impedance is about opposition in AC circuits and isn’t the defining characteristic here; voltage and current aren’t inherently changing with temperature—their values shift in response to the resistance changing with temperature.

A thermistor is a temperature-dependent resistor, so the property that changes with temperature is its resistance. As temperature rises, an NTC thermistor’s resistance decreases, while a PTC thermistor’s resistance increases. This happens because the semiconductor material in the thermistor changes how easily charge carriers can move as temperature changes. In a DC circuit, this changing resistance alters current according to Ohm’s law (V = I·R). Impedance is about opposition in AC circuits and isn’t the defining characteristic here; voltage and current aren’t inherently changing with temperature—their values shift in response to the resistance changing with temperature.