Modern train are based on maglev technology in which trains are magntically levitated, which runs its `EDS` maglev system. There are coils on both sides of wheels. Due to motion of the train, current induces in the coil of track which levitate it. This is in accordance with Lenz's law. If train lowers down then due to Lenz's law, repulsive force increase due to which train gets uplifted and if it goes much higher then there is a net downward force due to gravity. The advantage of Maglev trains in that there is no friction between the train and the track, thereby reducting power consumption and enabling the train to attain very high speeds. Disavantage of Maglev train is that as it slows down, the electromagnetic forces decreases and it becomes difficult to keep it levitaited and as it moves forward according to Lenz's law there ia an electromagnetic drag force.
What is the advantage of this system?

Options

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

Explanation

### Step-by-Step Solution

1. **Understanding Maglev Technology**:
- Maglev (magnetic levitation) trains utilize magnetic forces to lift and propel the train forward. This system relies on electromagnetic principles, particularly Lenz's law, which states that an induced current will flow in a direction that opposes the change in magnetic flux.

2. **Principle of Operation**:
- The coils on the sides of the train wheels interact with the coils in the track. As the train moves, it induces a current in the track's coils, which creates a magnetic field that lifts the train. If the train lowers, the repulsive magnetic force increases, lifting the train back up.

3. **Advantages of Maglev Trains**:
- **No Friction**: Since the train is levitated above the track, there is no physical contact, which eliminates friction. This lack of friction leads to:
- Reduced wear and tear on both the train and the track.
- Lower energy consumption since less energy is needed to overcome frictional forces.
- Ability to achieve higher speeds compared to conventional trains.

4. **Conclusion**:
- The primary advantage of the maglev system is the absence of friction between the train and the track, which significantly reduces power consumption and allows the train to reach very high speeds.

### Final Answer:
The advantage of the maglev train system 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.

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