As part of a personal garage tinkering project, I am utilizing the equation (Faraday's?) to figure the voltage output of a DC induction coil (magnetic induction generator) with an air core and I have some questions about the equation: ∑ = -N{(∆B*A) / ∆t}.(adsbygoogle = window.adsbygoogle || []).push({});

Where "A" is the area of the coil, does the equation refer to the entire area of the coil or the entire area minus the area of the air core (which would leave just the area occupied by the coil wire)?

Also, am I correct in understanding that "∆t" refers to the length time for one full cycle from North to South and back to North?

I have been trying to teach myself the physics involved in this spare time project and I want to make sure I understand the math correctly. I would appreciate any assist or explanation that anyone could give. Thanks in advance.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Need explanation on part of induction equation

**Physics Forums | Science Articles, Homework Help, Discussion**