asked in 科學其他:科學 · 1 decade ago

質點作等速率圓周運動時,速度v與所受磁力的關係

圖所示,一磁場均勻且方向垂直紙面下,則帶正電質點在此磁場中作等速率圓周運動時,其速度v與所受磁力的關係?

http://img216.imageshack.us/img216/5894/22ve5.jpg

拜託大家囉

1 Answer

Rating
  • Anonymous
    1 decade ago
    Favorite Answer

    The electric particle is not positive. But the question says that it's positive.

    If your problem statement is right and the picture is wrong, the answer is (D)

    圖片參考:http://img152.imageshack.us/img152/5461/physicsdw0...

    ps. The dierction of B is to enter the paper.

    If the picture is right and the statement is wrong, the answer is (c)

    Because it is a negative electric charge, the direction is opposite to positive one, in other words, the direction of it is right.(→)

    Source(s): Me
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