A conducting circular loop is rotated about its diameter at a constant angular speed of 100 rad / s in a magnetic field of 0.5 T perpendicular to the…

A conducting circular loop is rotated about its diameter at a constant angular speed of $\displaystyle 100 \mathrm{rad} / \mathrm{s}$ in a magnetic field of $\displaystyle 0.5$ T perpendicular to the axis of rotation. When the loop is rotated by $\displaystyle 30$° from the horizontal position, the induced EMF is $\displaystyle 15.4$ mV . The radius of the loop is $\displaystyle \_\_\_\_$ mm. $$\left(\text { Take } \pi=\frac{22}{7}\right) $$