positive temperature coefficient

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• Positive temperature coefficient — (PTC) refers to materials that experience an increase in electrical resistance when their temperature is raised. Materials which have useful engineering applications usually show a relatively rapid increase with temperature, i.e. a higher… …   Wikipedia

• positive temperature coefficient of resistance — teigiamasis temperatūrinis varžos koeficientas statusas T sritis radioelektronika atitikmenys: angl. positive temperature coefficient of resistance vok. positives Widerstandstemperaturkoeffizient, m rus. положительный температурный коэффициент… …   Radioelektronikos terminų žodynas

• positive temperature coefficient — (PTC) a thermistor (temperature sensor) whose resistance increases as the temperature increase. The opposite of a negative temperature coefficient (NTC) thermistor …   Dictionary of automotive terms

• positive temperature coefficient — noun : a larger than 1 ratio of a quantity (as resistance or length) at a higher temperature to the corresponding value of the quantity at a lower temperature …   Useful english dictionary

• positive temperature coefficient thermistor — (PTC) Electronic thermistor which increases in resistance as temperature increases …   Dictionary of automotive terms

• Temperature coefficient — The temperature coefficient is the relative change of a physical property when the temperature is changed by 1 K. In the following formula, let R be the physical property to be measured and T be the temperature at which the property is… …   Wikipedia

• Negative temperature coefficient — A negative temperature coefficient (NTC) occurs when the thermal conductivity of a material rises with increasing temperature, typically in a defined temperature range. For most materials, the thermal conductivity will decrease with increasing… …   Wikipedia

• Coefficient de température négative — Thermistance Les principaux capteurs de température utilisés en électronique sont basés sur la loi de variation d’une résistance. Ces éléments ne suivent pas la loi d’Ohm : ce sont des résistances non linéaires. Thermo résistances :… …   Wikipédia en Français

• coefficient positif de température de résistance — teigiamasis temperatūrinis varžos koeficientas statusas T sritis radioelektronika atitikmenys: angl. positive temperature coefficient of resistance vok. positives Widerstandstemperaturkoeffizient, m rus. положительный температурный коэффициент… …   Radioelektronikos terminų žodynas

• Coefficient of variation — In probability theory and statistics, the coefficient of variation (CV) is a normalized measure of dispersion of a probability distribution. It is also known as unitized risk or the variation coefficient. The absolute value of the CV is sometimes …   Wikipedia

• coefficient — 1. The expression of the amount or degree of any quality possessed by a substance, or of the degree of physical or chemical change normally occurring in that substance under stated conditions. 2. The ratio or factor that relates a quantity… …   Medical dictionary