Physics, 03.08.2021 01:00 Kurlyash

Why can't cars be constructed that can magnetically levitate in Earth's magnetic field? a. The current needed would be excessive.
b. The current within the car must flow in a complete circuit, about half Of which would exert forces against levitation.
c. Magnetic forces are always very weak.
d. Earth's magnetic field is in the wrong direction.

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