An electric broiler is rated at 1440 watts and 120 volts. The broiler is connected to a 120 – volt line. a) Draw a diagram of the circuit, showing a voltmeter and an ammeter properly connected to determine the actual power (wattage) of the broiler. b) Find the resistance of the heating coil, if the broiler is operating at its rated power c) Assuming that all of the electrical energy used is converted to heat energy, determine the heat energy it produces in 10 minutes. d) The line protected by a 15 Ampere used. How much additional current can be drawn from the line before it blows? * a.) Show your solutions   b.) Show your Derivation of Formula   c.) Show your solutions in converting the unit to another

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Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.