What is the magnitude of the electromotive force (emf) induced between its wing tips?
0.60 μV0.60\text{ }\mu\text{V}0.60 μV
60 μV60\text{ }\mu\text{V}60 μV
300 mV300\text{ mV}300 mV
600 mV600\text{ mV}600 mV