Torque experienced by a current loop placed in a uniform magnetic field

Discussion in 'Physics' started by logearav, Oct 16, 2011.

  1. logearav

    Thread Starter Member

    Aug 19, 2011
    248
    0
    Revered Members,
    In my attachment, while measuring the angle between current element I(QR) and magnetic field B, they are going in clock wise direction that is from R to Q(shown in Red line), so it is (90 - Θ ) and while measuring the angle between current element I(SP) and B, they are going in anti clockwise direction that is from P to S(shown in Red line), so it is (90 + Θ).
    May I get clarification from revered members as to why they have gone in different directions to measure the angle, instead of adopting the same direction, either clockwise or anti clockwise, for measuring the angle in the arms QR and SP?
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Because they measure the angle according to the direction of current.
     
  3. logearav

    Thread Starter Member

    Aug 19, 2011
    248
    0
    Thanks mik3 for your reply. The current starts from the point P and terminates at Q(for the arm PQ) and similarly it starts from point S and terminates at P(for the arm SP), so what harm in measuring the angle from the starting point rather the terminating point of current in both the arms(PQ and SP)?
     
Loading...