1.年级：大学
2.科目：物理
3.章节：电磁感应
4.题目：
A simple generator has 480 square coils with a side of 22.0cm.
How fast does the coil in a magnectic field(0.55T) have to rotate to produce
a voltage at a amplitude of 120V.
(正解: 1.49转/秒)
5.想法：
http://imgur.com/a/rXLmZ
算出来跟答案不一样, 而且好像也不是差"根号2"倍
有点没头绪了, 还请各位物理高手给个提示~
感谢!