# Change in EMF due to falling magnet

• Drizzy
In summary, the conversation discusses a graph and the behavior of a magnet as it moves towards and away from a coil. It is mentioned that the magnetic field changes at the location of the coil and is dependent on the magnet's velocity. However, it is clarified that the magnetic field only depends on the location of the magnet, not its velocity.
Drizzy

## Homework Statement

My problem is trying to understand this graph and explain why it changes the way it does

## Homework Equations

[/B]
e=change in ∅/change in time

## The Attempt at a Solution

[/B]
I know that the magnetic field increases/decreases when the magnet is on the way into the coil and when it is on the way out/through. I also know that the velocity on the way out is bigger and that's why the red part is narrower and it reaches a bigger EMF. One thing I don't understand is what happens between the entry and exit? The magnet is accelerating downward because of gravity. Does that mean that the magnetic field is changing? The magnetic field is dependent on the velocity, right?

Drizzy said:
The magnet is accelerating downward because of gravity. Does that mean that the magnetic field is changing?
At the location of the coil, the magnetic field due to the magnet is changing.

The magnetic field is dependent on the velocity, right?
At the location of the coil, the magnetic field due to the magnet depends only on the location of the magnet, not the velocity of the magnet.

## 1. How does a falling magnet affect the EMF?

When a magnet falls, it creates a change in the magnetic field around it. This change in the magnetic field induces an electric current, resulting in a change in the electromagnetic force (EMF).

## 2. What factors can influence the change in EMF due to a falling magnet?

The change in EMF due to a falling magnet can be influenced by factors such as the strength of the magnet, the speed at which it falls, and the distance between the magnet and the conductor.

## 3. Is the change in EMF due to a falling magnet constant?

No, the change in EMF due to a falling magnet is not constant. It depends on the factors mentioned above and can vary at different points in time during the fall.

## 4. How can the change in EMF due to a falling magnet be measured?

The change in EMF due to a falling magnet can be measured using a device called an EMF meter, which detects changes in electric and magnetic fields.

## 5. What are some real-world applications of the change in EMF due to a falling magnet?

Some real-world applications of the change in EMF due to a falling magnet include energy generation in hydroelectric dams, electromagnetic induction in electric generators, and magnetic braking systems in trains and roller coasters.

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