Modern trains are based on Maglev technology in which trains are magnetically leviated, which runs its EDS Maglev system. There are coils on both sides of wheels. Due to motion of train, current induces in the coil of track which levitate in. This is in accordance with Lenz’s law. If trains lower down then due to Lenz’s law a repulsive force increases due to which train gets uplifted and if it goes much high then there is a net downward force due to gravity. The advantage of Maglev train is that there is no friction between the train and the track, thereby reducing power consumption and enabling the train to attain very high speeds. Disadvantage of Maglev train is that as it slows down the electromagnetic forces decreases and it becomes deffficult to keep it leviated and as it moves forward according to Lenz’s law ther is an electromagnetic drag froce.
What is the advantage of this system?

Options

A. No friction hence no power consumption
B. No electric power is used
C. Gravitation force is zero
D. Electrostatic force draws the train

Answer

A