# Does RPM affect electricity generation?

by Ralphonsicus
Tags: current, electricity, induction, magnets rpm, physics
 P: 47 Let's say I have a magnet inside a coil of wire. If I spin the magnet for a 10 second period, twice, the second time spinning it significantly faster, will more current be induced during the second period? And would this apply to generators in wind turbines, etc.? Thanks.
P: 404
 Quote by Ralphonsicus Let's say I have a magnet inside a coil of wire. If I spin the magnet for a 10 second period, twice, the second time spinning it significantly faster, will more current be induced during the second period? And would this apply to generators in wind turbines, etc.? Thanks.
If you mean the induced "emf" is higher, you are right. According to Faraday's low, the induced emf is proportion to the rate of flux change. Higher speed, faster change of the flux. The current, however, depend on the load. If you have a resistive load and it is fixed, the current is proportional to the emf.

Yes this applies to wind generators too, but more wind power is required then and it may affect the efficiency of the win turbine.