# Magnetic Force On this disk !!

In the figure given above, the wire carries a current I. The disk is made up of a non-conducting material with a charge density $$\sigma$$.The disk is rigidly attached to the axis passing through the point(L,0,0) (along the z axis) with the help of a rigid rod of length x which is along the x axis.The axis is fixed.Now the disk is rotated about this axis with an angular velocity $$\omega$$ (as shown in the figure) with the direction of the angular velocity vector coinciding with the current flow direction.The radius of this disk is R.The distance between the center of the disk and the axis is x (as shown in the figure). Find the magnetic force which acts on the disk just after it is given this angular velocity. (in Newtons) Given: R=1m; L=5m; x=1m; I=10$$^7$$ A; $$\omega$$ =2rad/s; $$\sigma$$ = 7C/m$$^2$$

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