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This is intrigueing. Are you saying that radiocommunications are severely affected near a fire? Does it apply to cellphones as well as radio? Daniel

ice2aqua, I am afraid your question makes no sense to me.  Can you elaborate, please?  What is the drawing, what is the product, what do the voltages refer to, and what is the relationship between the drawing and the product?

I agree with the last two responses.  There are 2 unknowns - a and B - and two equations.  If you don't use the known relationship between cos and sin, then it becomes 3 unknowns, cos(a), sin(a) and B and three unknowns can't be solved from 2 equations.  So you have...

FCC approved frequencies for microwave ovens are 915, 2450 and 5500 MHz but most ovens operate at 2450 MHz.<br><br>The cooking chamber is enclosed on all sides by metal plates except that the door has a perforated plate.&nbsp;&nbsp;These reflect the microwaves and prevent them from leaving the...

Can any of you microwave specialists (or others) please tell me<br>- what is the range of frequencies used in microwave cooking, and<br>- how do the ovens prevent microwave radiation from coming out of the cooking enclosure (except at levels below statutary limits)?<br>Thankyou.

You could try getting a book on the subject. I searched&nbsp;&nbsp;Amazon.com for books on &quot;emc&quot; and got a list, including Introduction to Emc by John S. Scott, Clinton Van Zyl, Clinton Van Zyl. I don't know how good this is. You could try a large technical bookshop, but the subject is...