b on 2, and f = 1000 Hz, write ZR, ZL, 5-35. A two-branch circuit consists of the com- ponents show in Fig. P5.35, where ZR = R for both resistors, ZL = jwL, and Zc= %3D %3D where o = 2rf. jaC' (a) Given C = 1.2 µF, L = 3 mH, R = 50 %3D %3D %3D 2, and f = 1000 Hz, write Z and Zc in both their rectangular and %3D 02 polar forms. (b) The impedance of one branch of the circuit is Z = Zc + ZR, while the impedance of the other branch is Z2 = Z1 + ZR: Find the total equiv- alent impedance of the circuit Z = Z, Z2 Z+Z2 both its rectangular and polar forms. %3| Inst and express your result in Z z L R R Figure P5.35 Two-branch circuit for problem P5.35. ww ww

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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.