A semiconductor whose resistance decreases rapidly with increasing temperature is called what?

A semiconductor whose resistance decreases rapidly with increasing temperature is called what?

• A. Thermistor
• B. LDR (Light Dependent Resistor)
• C. Filament bulb
• D. Diode

Answer: (A)

The concept here is how resistance changes with temperature in different electronic components. A thermistor is a resistor whose resistance depends strongly on temperature. For a semiconductor thermistor, the resistance falls as temperature rises because more charge carriers become available, so it has a negative temperature coefficient. This rapid drop with temperature is exactly what’s described. An LDR changes mainly with light, not temperature. A filament bulb’s resistance increases as it heats up. A diode isn’t characterized by a simple resistance that decreases with temperature; its behavior with temperature is more about shifts in its I–V characteristics, not a straightforward resistance trend.

The concept here is how resistance changes with temperature in different electronic components. A thermistor is a resistor whose resistance depends strongly on temperature. For a semiconductor thermistor, the resistance falls as temperature rises because more charge carriers become available, so it has a negative temperature coefficient. This rapid drop with temperature is exactly what’s described.

An LDR changes mainly with light, not temperature. A filament bulb’s resistance increases as it heats up. A diode isn’t characterized by a simple resistance that decreases with temperature; its behavior with temperature is more about shifts in its I–V characteristics, not a straightforward resistance trend.