Problem 3 Consider Circuit B in Problem 1 again. Recall that it is excited by an ac voltage source of 120 V at a frequency of 60 Hz. 1kN a) Find the power supplied by the generator. b) Find the power supplied to the capacitor. c) What is the maximum power supplied to the capacitor and at what instant is this reached? 120 V 20° 1 μF Circuit B • For the problems (a) and (b) explain the definition of instantaneous power and how it is calculated in general. • For problem (c) explain how you are going to find the unknowns.

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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.