Question

While trying to find the rating of your toaster you find the circuit diagram instead. Your friend believes there must be an error in the diagram. The heating element responsible for toasting is listed as having a resistance of 4 ohms. A variable resistor, which is changed by a control knob, has a range of from 3 to 25 ohms. Your friend feels this resistance will not toast bread properly. Based on the diagram below, you decide to calculate the maximum power output by the heating element.

110 Y 42 100 S2 V min 25 v max

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