Figure Q25.5 shows four different circular loops that are perpendicular to the page. The radius of loops 3 and 4 is twice that of loops 1 and 2. The magnetic field is the same for each. Rank in order the magnetic fluxes \(\Phi_{1}\) through \(\Phi_{4}\), from the largest to the smallest. Some may be equal. Explain.

17 45 45 Loop 1: Loop 2: r=1 r=1 FIGURE Q25.5 Loop 3: r=2 Loop 4: r=2