# Questions tagged [electromagnet]

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### Making a electromagnet

Can a insulated wire be used to make a electromagnet? Will there be any difference in strength of the magnet if I use an uninsulated wire instead? By uninsulated wire I mean this:
52 views

### Switching an electromanet

My task is to provide a relay/control board that can as quickly as possible switch off the current supply to a 2.5W electromagnet, or more specifically, make the magnet release the objects it's ...
81 views

### Building an ac electromagnet

I want to generate a sinusoidal electromagnetic field of a specificed frequency between 30-80 Hz. For that I was going to pass an ac current to the an electromagnet. What do I generate an ac current ...
43 views

### How to calculate the electromagnetic strength between an iron piece and an electromagnet IF both of them are not parallel?

I am sorry if this question is a bit silly, but I don't really know how to calculate the electromagnetic force between a magnet and an iron piece if they are not parallel to each other. The ...
40 views

### Decrease electromagnet discharge time

I have a conveyor belt under which there are electromagnets to hold a piece of steel during movement. At the end of the belt the pieces must be unloaded with suction cups. Over a certain speed the ...
83 views

### How should I make a constant AC current source to drive an electromagnet?

The inductance of the electromagnet is about 0.05H and the resistance is under 50 Ohm and I need about 2 to 5 Amperes to drive it. I need to be able to change the amplitude and also the frequency at ...