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In a conventional vehicle, power is diss...

In a conventional vehicle, power is dissipated due to friction . To reduce the loss of power due to friction MAGLEV train using an LEDS (electrodynamic suspension) technology was developed. It works on the principle of Lenz's law. In this system, a train moves without contact with the track due to which there is no loss of power due to friction.
The disadvantage of LEDS is that

A

lt cannot overcome the force of gravity

B

Repulsive force is conservative so it lifts the vehicle and brings down

C

Magnetic force tends to bring down the train

D

Lot of energy is lost to start the motion as there is more opposition to the motion at lower speeds

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The correct Answer is:
D
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In a conventional vehicle, power is dissipated due to friction . To reduce the loss of power due to friction MAGLEV train using an LEDS (electrodynamic suspension) technology was developed. It works on the principle of Lenz's law. In this system, a train moves without contact with the track due to which there is no loss of power due to friction. The advantage of EDS is that

In a conventional vehicle, power is dissipated due to friction . To reduce the loss of power due to friction MAGLEY train using an EDS (electrodynamic suspension) technology was developed. It works on the principle of Lenz's law. In this system, a train moves without contact with the track due to which there is no loss of power due to friction. Which of the following statements about MAGLEV train is correct?

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 disadvantage of this system?

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?

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. Which force causes the train to elevate up?

RESNICK AND HALLIDAY-ELECTROMAGNETIC INDUCTION-PRACTICE QUESTIONS (Linked Comprehension)
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