R1 Vx - Considering the given circuit, Vz = 6.5 V @ 4 mA, R1 = 0.5 kN, V = 12±3 V, and rz 25 N. If the minimum value of R2 is 3 kN to keep the zener diode in breakdown region, determine IzK. %3D Note that because of the approximations, your result might be slightly different than the correct answer. However, it should be very close to it; hence, in that case, simply go for the choice that is closest to your result. Zener

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Thermistors

A thermistor is a special type of resistor whose resistance is more temperature-dependent than standard resistors.  The resistance of the thermistor decreases with increasing temperature. This is the basic principle of thermistors. This allows the thermistor circuit to detect very small temperature changes that cannot be observed with the Resistance temperature detectors (RTDs) or the thermocouples. Since the resistance of a thermistor is temperature dependent, it can be connected to an electrical circuit to measure body temperature. This high sensitivity to temperature changes makes thermistors very useful for accurately controlling and calibrating temperature measurements. In general, resistance increases with increasing temperature in most metals, but thermistors react negatively.