Sobre

Faraday's law of induction is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force, a phenomenon known as electromagnetic induction. It is the fundamental operating principle of transformers, inductors, and many types of electric motors, generators and solenoids.

 

We believe that by spinning a wheel with magnets around it, we will be able to induce an electromotive force. The electromotive force would be used as electric current to power small gadgets, such as colourful LED lights, and, ultimately, to transfer energy to a powerbank that would store it and then charge bigger devices like smartphones and even laptops.

​

Considering a rotating speed of 14 km/h for our wheel with 60 cm of diameter, this means a frequency of 2,06 Hz and a period of 0,485 seconds.

The maximum value for the magnetic flux is given by the expression Φ =1000 x 0,3 x (4 x 10^-4) x cos 0 = 0,12 Wb

This gives us an induced electromotive force of ϵ = |0,12 - 0,00| / (1,03 x 10^-2) = 11,7 V