A wire is bent in a semi-circle as shown here.
The semi-circle has a radius of r= m. The crank is turned, causing the semi-circle to rotate in the
magnetic field. The crank is turned at 
= revs/second and the magnetic field has strength
B= Tesla. Find
- The frequency of the EMF induced in the semi-circle.
- The amplitude of the EMF induced in the semi-circle.