ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Physics => Topic started by: faytl on November 05, 2009, 01:39:27 pm

Title: need help with electric power
Post by: faytl on November 05, 2009, 01:39:27 pm

hi well i've been doing some exams and there's a question that pops up, find the emf of blah blah
i do it but when i look at the answers, some answer with faraday's law and other's with lenz's law. which do i use?

Title: Re: need help with electric power
Post by: /0 on November 05, 2009, 01:42:42 pm

Lenz's Law determines the direction of the current. If you are just asked for the emf then you only need to use Faraday's Law, since they don't ask you for the direction.

Title: Re: need help with electric power
Post by: faytl on November 05, 2009, 05:17:08 pm

ahhh ok thanks saved me there :D