Question

Soalan 3 Question 3 Ketiga-tiga bahagian berikut adalah berkaitan: The following three sections are related: Selesaikan ketumpatan fluks magnet B bagi suatu titik di paksi suatu gelung (a) bulat yang berjejari b, dan terletak di satah x-y. Gelung ini membawa arus dalam arah lawan jam. Andaikan bahawa titik tersebut adalah berjarak z unit di atas paksi gelung ini. Solve the magnetic flux density B at a point on the axis of a circular loop (wire) of radius b that carries a direct current I in counter clockwise direction. Assume that the point is z unit above the center of the loop as the loop lies in the xy-plane. (6 markah/marks) Gelung yang sama diletakkan dalam suatu medan B yang sekata. Tentukan (b) jumlah daya yang bertindak di atas gelung tersebut sekiranya arus I mengalir dalam arah lawan jam dalam gelung tersebut. The same loop is now placed in a uniform B field. Evaluate the total force acting on the loop if the constant current I is flowing in the counter clockwise direction in the loop (6 markah /marks) Kirakan jumlah tork yang bertindak ke atas gelung dalam bahagian (b) (c) Calculate the total torque acting on the loop in part (b). (8 markah / marks)

Answer 1

Solution uiven the data Hura magni sadius Die Conent ficdd at p magne tiC dB Cos dB I d sin (e0) YTT dB B net dB sin0 Cancel out witl But dB ose Idl sino 5Mo 4TT So B net UTT くニ

B net UTT B net 19or Bnet 2b2 anis along the that we Knoio F 1B let sine length 0Angle betureen tinal and between Lett ength initial point loop lett-o cis alar So FO

that we m is perpen dialon to Then I me sinfo sin 90 Jw I TTB b