Final answer:
When a magneto is disassembled, keepers are usually placed across the poles of the rotating magnet to reduce the loss of magnetism.
The keepers help retain the magnetism in the magnet even when it is disassembled by providing a closed magnetic circuit.
By placing the keepers across the poles of the rotating magnet, the magnetism is more effectively preserved, reducing the loss of magnetism.
Step-by-step explanation:
When a magneto is disassembled, keepers are usually placed across the poles of the rotating magnet to reduce the loss of magnetism.
A magneto is a device that creates a spark across a gap by creating a large voltage across the gap. To do this, the device spins a magnet very quickly in front of a wire coil.
The keepers, which are pieces of ferromagnetic material, help retain the magnetism in the magnet even when it is disassembled by providing a closed magnetic circuit, which prevents the leakage of magnetic flux.
By placing the keepers across the poles of the rotating magnet, the magnetism is more effectively preserved, reducing the loss of magnetism.