[单选题]
A circular disc magns* vnij0-;cl7:qzwni; fus n1ot./ u,as)m gket and a conducting rinxczbrxm4x ld0 ) h/u((g are located as shown.
The circular disc magnet turns around the vertical axis with a constant angular frequency of $ω$. Which of the following graphs could show the variation of induced current in the conducting ring with time for one revolution of the magnet?
