1 Answer
Lenz's Law is a fundamental principle in electromagnetism that describes the direction of an induced current when there is a change in magnetic flux through a circuit. It states that the direction of the induced current (or induced emf) will always oppose the change in magnetic flux that caused it.
In simpler terms, Lenz's Law says that nature resists changes in the magnetic environment. If the magnetic flux through a coil or loop of wire increases, the induced current will flow in such a way that it creates a magnetic field opposing the increase. Similarly, if the magnetic flux decreases, the induced current will flow in a direction that tries to maintain the flux.
Example:
Imagine you have a coil of wire, and a magnet is moving towards it. As the magnet approaches, it increases the magnetic flux through the coil. According to Lenz’s Law, the coil will generate a current that creates a magnetic field opposing the approaching magnet. If you try to push the magnet away, the coil will generate a current that resists that motion.
Lenz's Law is a consequence of the law of conservation of energy and helps to explain why you can't create perpetual motion machines (machines that keep going forever without any input) using magnetic fields.
In simpler terms, Lenz's Law says that nature resists changes in the magnetic environment. If the magnetic flux through a coil or loop of wire increases, the induced current will flow in such a way that it creates a magnetic field opposing the increase. Similarly, if the magnetic flux decreases, the induced current will flow in a direction that tries to maintain the flux.
Example:
Imagine you have a coil of wire, and a magnet is moving towards it. As the magnet approaches, it increases the magnetic flux through the coil. According to Lenz’s Law, the coil will generate a current that creates a magnetic field opposing the approaching magnet. If you try to push the magnet away, the coil will generate a current that resists that motion.Lenz's Law is a consequence of the law of conservation of energy and helps to explain why you can't create perpetual motion machines (machines that keep going forever without any input) using magnetic fields.