* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Faraday`s Law - WordPress.com
Survey
Document related concepts
Alternating current wikipedia , lookup
High voltage wikipedia , lookup
Lorentz force wikipedia , lookup
Electric machine wikipedia , lookup
Force between magnets wikipedia , lookup
Electricity wikipedia , lookup
Friction-plate electromagnetic couplings wikipedia , lookup
History of electrochemistry wikipedia , lookup
History of electromagnetic theory wikipedia , lookup
Michael Faraday wikipedia , lookup
Induction heater wikipedia , lookup
Eddy current wikipedia , lookup
Electromotive force wikipedia , lookup
Superconducting magnet wikipedia , lookup
Transcript
Generation of electricity from a wind turbine Bradley Gaskell Faraday’s Law Faraday's law of induction says that when a magnetic field changes, it causes a voltage The experiment: Faraday takes a magnet and a coil and connects a galvanometer (A device used for detecting and measuring electrical current) across the coil. At starting, the magnet is at rest, so there is no deflection in the galvanometer i.e. needle of galvanometer is at the center or zero position When the magnet is moved towards the coil, the needle of galvanometer deflects in one direction Faraday’s Law (Continued) When the magnet is held stationary at that position, the needle of galvanometer returns back to zero position Now when the magnet is moved away from the coil, there is some deflection in the needle but in opposite direction and again when the magnet becomes stationary the needle of the galvanometer returns back to the zero position Similarly, if magnet is held stationary and the coil is moved away and towards the magnet, the galvanometer shows deflection in similar manner. It is also seen that, the faster the change in the magnetic field, the greater will be the induced emf or voltage in the coil. Faraday’s Equation Key: Triangle = Delta E = Induced Voltage/EMF N = Number of Turns Wind turbines A wind turbine is a device that converts the wind's kinetic energy into electrical power Wind turbines have blades which rotate via the wind, this rotation changes the kinetic energy into an electrical output How Faraday’s Law and Wind Turbines are Related The main principle of a wind turbine electric generator is: The kinetic energy of the wind makes the blades of a wind turbine to rotate. When the wind turbine rotates armature of a electric generator which will produce the electricity according to Faraday's law of electromagnetic induction.