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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Physics => Topic started by: qshyrn on August 16, 2010, 08:05:06 pm

Title: direction of current in this problem
Post by: qshyrn on August 16, 2010, 08:05:06 pm

can someone help me with this (part b): the answers say that its anticlockwise, but i worked it out to be clockwise..?

my reasoning: the mag field goes out of page,  induced field counteracts (going into page)  and then using RH rule

Title: Re: direction of current in this problem
Post by: pooshwaltzer on August 16, 2010, 08:25:32 pm

Lenz's Law

Gives a physical interpretation of the direction of the induced e. m. f.:

An induced current in a closed conducting loop will appear in such a direction that it opposes the change that produced it.

Going in = counterclockwise (see pic)