P3, The motor effect 0.0 / 5 ? PhysicsKeeping Things MovingGCSEAQA Created by: emmajane_Created on: 05-05-14 10:10 What happens when an electric current flow through a wire? When is the effect used? A magnetic field is produced around the wire. This field will only remain while current is being passed though. UIsed in electromagnets 1 of 7 What does a circuit braker do the same job as? A fuse 2 of 7 What do loudspeakers do? They transform electrical signals into sound 3 of 7 Describe the inside of a loud speaker and how it works Inside there is a permenant magnet. An electromagnet is attached to the speaker cone is the magnetic field of the permenant magnet. 4 of 7 How can a simple electric motor be built? Using a coil of wire that is free to rotate between two magnetic poles 5 of 7 What do electric motors use? The electric motor effect 6 of 7 How can the speed of a motor be increased? By increasing the size of the current or the size of the magnetic field 7 of 7
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