2. An uncharged 30.0-uF capacitor is connected in series with a 25.0-0 resistor, a DC battery, and an open switch. The battery has an internal resistance of 10.0 and the open-circuit voltage across its terminals is 50.0 V. The leads have no appreciable resistance. At time t-0, the switch is suddenly closed. What is the maximum current through the 25.0-Q resistor and when does it occur (immediately after closing the switch or after the switch has been closed for a long time)? What is the maximum charge that the capacitor receives? When the current in the circuit is 0.850 A, how much charge is orthe plates of the capacitor? 250 ww 100 50V 30AF

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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.