Ordinary (optical) microscopes use a series of glass lenses to magnify tiny objects, while super-powerful electron microscopes use electromagnets to bend electron beams that help us see in even more detail. Movie projectors and projection televisions use lenses to convert small movie pictures into ...
Electric power lines with large gray canisters have electromagnets inside these transformers to step-down the high-voltage current from the power line to a residence or business. The electromagnet inside the gray transformer makes it possible to transfer the electrical current, which is typically a m...
This makes brushless motors more efficient. There is no sparking and much less electrical noise. There are no brushes to wear out. With the electromagnets on the stator, they are very easy to cool. You can have a lot of electromagnets on the stator for more precise control. The only ...
Which property of soft iron makes it useful for preparing an electromagnet? high susceptibility and high retentivity. Hint: Soft iron is a special kind of magnetic material which are generally used for making electromagnets becauseit gets easily magnetised and also loses its magnetismas soon as the...
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This makes brushless motors more efficient. There is no sparking and much less electrical noise. There are no brushes to wear out. With the electromagnets on the stator, they are very easy to cool. You can have a lot of electromagnets on the stator for more precise control. The only ...
Magnetic bearings use electromagnets to levitate the rotating shaft so nothing is physically touching it. A typical magnetic bearing system will require 4 or 5 drives - an x and y on each side of the rotating shaft and an optional thrust bearing to keep the shaft from floating in and out....
Electromagnets The archetype electromagnet is the crane-operated model that picks up automobiles and scrap metal by the ton. This model demonstrates one of the desirable features of the electromagnet–it becomes a magnet or not a magnet at the flip of a switch. The electric current running around...
You can have a lot of electromagnets on the stator for more precise control. The only disadvantage of a brushless motor is its higher initial cost, but you can often recover that cost through the greater efficiency over the life of the motor....