A circular loop of conducting wire with radius $r_o$ is in a plane oriented perpendicular to the direction of a uniform constant magnetic field $B_o$. As shown in the accompanying figure, placed on this wire loop are two conducting sliders. One slider is fixed and the other is rotating counter-clockwise with an angular frequency of $\omega$ rad/sec.
What is the magnitude of the voltage measured between points 'a' and 'b'? (assume points 'a' and 'b' are very close together at the center of the loop)