The total charge of an insulating disk of radius R=20 cm is q=5C. The charge Q is not evenly distributed on the surface of the disc, and the surface charge density is given by the expression alpha=Axr. Here A is a constant and r is the distance from the center of the disk. The disk rotates around the y-axis with an angular velocity of W=20 rad/s. Find the magnetic moment M of the disk.

R = 20cm yarapl yaltkan bir diskin toplam yk Q yzeyine dzgn dalmam olup, yzey yk younluu o = Ar ifadesi ile verilmektedir. Burada A bir sabit r ise diskin merkezinden ol an uzaklktr. Disk W = 20ad asal hz ile y-ekseni etrafnda dnmektedir. Diskin 5C dur. Q yk diskin manyetik momentini bulunuz a) 0,15 Am2 b) 1,2 Am2 c) 4,05 Am2 d) 9,6 Am? e) 18,75Am2