A slender metal bar AC of length ( and mass m is pivoted at A as shown in Figure. The bar oscillates in a vertical plane with simple angular harmonic motion such that at any instant of time t the angle O between the vertical and the axis of the bar is given by 0= Ao sin (@x), where 6 and w are constants. The bar oscillates in a uniform magnetic field, where the field is everywhere perpendicular to the bar and directed into the plane of the diagram.

A slender metal bar AC of length ( and mass m is pivoted at A as shown in Figure. The bar oscillates in a vertical plane with simple angular harmonic motion such that at any instant of time t the angle O between the vertical and the axis of the bar is given by 0= Ao sin (@x), where 6 and w are constants. The bar oscillates in a uniform magnetic field, where the field is everywhere perpendicular to the bar and directed into the plane of the diagram.