This paper briefly describes electric vehicle (EV) magnetic field measurement and evaluation techniques, and compares ac magnetic field results from different electric vehicles (EV). The survey includes nine vehicles from different U.S. manufacturers. These vehicles are powered by either ac or dc motors. Measurement results show that the highest field is generated during regenerative braking and maximum acceleration. Inside the vehicle, the highest field is measured on the driver's seat. Results of measurements also show the importance of shielding the ac magnetic field.