10. Electro Magnetism
Electromagnetism introduces the magnetic effects of electric current and outlines how various configurations of current-carrying conductors generate magnetic fields. Key principles such as the Right-Hand Thumb Rule and Fleming’s Left-Hand Rule help determine the direction of current and force in magnetic fields. Applications of electromagnetism are pervasive in devices like electric motors, solenoids, and electromagnets.
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What we have learnt
- A current-carrying conductor produces a magnetic field around it.
- The strength of a magnetic field depends on the current and the distance from the conductor.
- Fleming’s Left-Hand Rule is crucial in determining the direction of force on a current-carrying conductor.
Key Concepts
- -- RightHand Thumb Rule
- A rule to determine the direction of the magnetic field around a current-carrying conductor by pointing the thumb in the direction of the current.
- -- Magnetic Field
- The region around a magnet or current-carrying wire where magnetic force is exerted.
- -- Electromagnet
- A temporary magnet formed by passing current through a coil wound around a soft iron core, allowing it to be switched ON and OFF.
- -- Fleming’s LeftHand Rule
- A rule used to find the direction of force on a current-carrying conductor when placed in a magnetic field.
- -- Electric Motor
- A device that converts electrical energy into mechanical energy using the interaction between magnetic fields and current.
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