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Questions and Answers
What happens to the current induced in the coil when the North-pole of a bar magnet moves towards the coil?
What happens to the current induced in the coil when the North-pole of a bar magnet moves towards the coil?
What is Lenz's law?
What is Lenz's law?
In Lenz's law, the negative sign represents:
In Lenz's law, the negative sign represents:
What is the direction of the current in the coil, according to Lenz's law, when the North-pole of a bar magnet moves towards the coil?
What is the direction of the current in the coil, according to Lenz's law, when the North-pole of a bar magnet moves towards the coil?
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What did Heinrich Friedrich Lenz deduce in 1834?
What did Heinrich Friedrich Lenz deduce in 1834?
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Study Notes
Induced Current in a Coil
- When the North pole of a bar magnet approaches a coil, a current is induced in the coil due to electromagnetic induction.
- The direction of the induced current creates a magnetic field that opposes the motion of the approaching magnet.
Lenz's Law
- Lenz's Law states that the direction of the induced current in a conductor is such that it opposes the change that created it.
- This law is a consequence of the conservation of energy, ensuring that induced currents work against changes in magnetic flux.
Negative Sign in Lenz's Law
- The negative sign in Lenz's Law signifies the opposing nature of the induced current to the change in magnetic field.
- It reflects the principle that the induced effect always counteracts the cause of induction.
Direction of Current According to Lenz's Law
- When the North pole of a bar magnet moves towards the coil, the induced current flows in a direction that generates a South pole on the coil’s side facing the magnet.
- This occurs to create a magnetic field that repels the approaching North pole.
Heinrich Friedrich Lenz's Deduction
- Heinrich Friedrich Lenz deduced in 1834 that the direction of induced current will always oppose the change in the magnetic field that produced it.
- His work laid the foundation for understanding electromagnetic induction and its applications in electrical engineering.
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Description
Test your understanding of Lenz's Law and the Conservation of Energy with this quiz. Explore the principle that the polarity of induced emf opposes the change in magnetic flux, as deduced by physicist Heinrich Friedrich Lenz.
