(P2) Generating electricity 0.0 / 5 ? ScienceElectricityGCSEOCR Created by: AnjelalaCreated on: 19-05-13 17:52 What are the 3 ways that increases the current from a dynamo? 1) Increasing the number of turns on the coil 2)Rotating the magnet faster 3)Using a stronger magnet. 1 of 12 Where can the output from a dynamo be displayed? The output from a dynamo can be displayed on an oscilloscope. 2 of 12 What does an oscilloscope show? An oscilloscope shows how the current produced by a dynamo varies with time. 3 of 12 What is the time for one complete cycle called? The time for one complete current is called the period of the alternating current. 4 of 12 What does a simple generator consist of? A simple generator consists of coil of wire rotating between the poles of a magnet. 5 of 12 How does a simple generator work? >The coil of wire cuts through the magnetic field as it spins >The current is produced in the coil 6 of 12 A current can be produced if... (Finish the sentence) The coil stays stationary and the magnets move. 7 of 12 What are fuels used for in a conventional power station? Fuels are used to heat water. 8 of 12 Explain why a conventional power station uses fuels to heat water... >The water boils to produce steam > Steam at high pressure drives a wind turbine > The turbine drives a generator. 9 of 12 What is efficieny? Effiency is a measure of how well a device transfers energy. 10 of 12 In a power station, where is energy lost? In a power station energy is lost in the boilers , generator and the cooling towers 11 of 12 What is the equation to work out efficiency? Useful energy output /divided by/ Total energy input = efficiency. 12 of 12
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