(a) A rectangular loop of wire is \(\ell=800 \mathrm{~mm}\) long and \(w=500 \mathrm{~mm}\) wide. You bend the \(\ell\) sides into a semicircle while keeping the \(w\) sides straight, as shown in Figure P29.36, and then move the curved loop at speed \(v=0.800 \mathrm{~m} / \mathrm{s}\) into a uniform magnetic field of magnitude \(B=0.600 \mathrm{~T}\). One of the sides labeled \(w\) is the leading edge of the moving loop, and the magnetic field direction is perpendicular to those sides. What is the value of the emf induced in the loop? 

\((b)\) What is the induced emf if the loop is rotated \(90^{\circ}\) so that the side leading into the magnetic field is one of the curved sides?

Data from Figure P29.36

Figure P29.36 B 109