P 41 The 5.2 m long metal rotor blades of a helicopter spin at 6.0 revolutions per second perpendicular to the earth's magnetic field of 4.7105 T. What is the magnetic flux swept out by the rotor blades in one revolution and what is the emf induced between the axis and tip of a rotor blade? MAGNETIC FLUX EMF INDUCED A. 4.010- Wb 2.410- V B. 4.010- Wb 4.010-3 V C. 2.410-2 Wb 2.410-2 V D. 2.410-2 Wb 4.010-3 V 5.2 m Axis 10 B