Wauchope, Joseph Alliene, 1873- · Chicago, Scott, Foresman and Company · leaf 70
of electricalpower is the watt. One ampere flowing under apressure of one volt is equivalent to one watt. Consult a reference for an explanation of the con-struction and operation of the arc lamp. EXPERIMENT No. 37 Question.—What is the efficiency of the electricmotor in the laboratory? That is,… … Directions.—To obtain the number of wattselectrical power put into the motor, connect the Electricity and Magnetism 69 ammeter in series and the voltmeter in parallel withthe motor as shown in Diagram No. 1. To obtain the mechanical power gotten out of themotor make use of the brake shown in…
Physics
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