Lorentz force and linear motors

In summary, the conversation was about a setup consisting of two conducting rods and magnets, which, when connected to a battery and a conductor, can produce motion based on Fleming's left hand rule. The question was raised about why this setup only works with electric current and not with permanent magnets. The answer is that while motion can be produced with permanent magnets, it eventually stops once the magnets reach their lowest potential energy condition. An electric motor, on the other hand, can maintain motion by reversing the electric current.
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rishi kesh
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I have a picture below please have a look at it. The guy is using two conducting rods placed parallel to each other and placed below it are magnets. When battey is connected to rods and a conductor is placed over them it starts to move.That works according to flemmings left hand rule. I was wondering why does it not work with permanent magnets? Why do we need electric current only?
 

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There is no reason why motion can't be produced, using two permanent magnets. But, once the magnets have reached the lowest possible potential energy condition (i.e. as close together or as far apart as they can get), there is no more net motion in the wanted direction. An electric motor, using some arrangement of reversing the electric current, can maintain motion in one direction for ever.
 
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1. What is the Lorentz force?

The Lorentz force is a fundamental force in electromagnetism that describes the force experienced by a charged particle moving in a magnetic field. It is perpendicular to both the direction of the particle's motion and the direction of the magnetic field.

2. How is the Lorentz force related to linear motors?

In linear motors, the Lorentz force is used to create motion by applying a magnetic field to a conductor carrying an electric current. This force causes the conductor to move in a linear direction, making it a key component in the operation of linear motors.

3. What factors affect the strength of the Lorentz force?

The strength of the Lorentz force is affected by the magnitude of the magnetic field, the magnitude of the electric current, and the angle between the direction of the current and the direction of the magnetic field. The force is also dependent on the charge and velocity of the particle experiencing the force.

4. How is the Lorentz force used in practical applications?

The Lorentz force has many practical applications, including in electric motors, generators, particle accelerators, and magnetic levitation systems. It is also used in the development of linear motors for high-speed transportation systems.

5. How does the Lorentz force contribute to the efficiency of linear motors?

The Lorentz force is crucial in the operation of linear motors, as it is responsible for creating motion in a linear direction. By utilizing this force, linear motors can achieve high speeds and efficiency in converting electrical energy into mechanical energy, making them a promising technology for various applications.

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