If a wire carrying current produces magnetic field around it, why its not attracted to nearby metals ? In a general household.

644 views

If a wire carrying current produces magnetic field around it, why its not attracted to nearby metals ? In a general household.

In: 477

27 Answers

Anonymous 0 Comments

[it IS attracted.](https://youtu.be/gZ5zD75yWwM?t=12) it’s just a really really weak attraction. you can either make a coil (a single wire is considered a single loop coil of wire) the more loops, the stronger the magnetic force. or more current. or both.

you can test this yourself. take a small short wire and use it to short out a 9v battery right next to a compass (or the compass app on your phone) and you’ll see the compass move. those are sensitive enough to detect the attraction created by the wire.

EDIT: also, the compass thing won’t work with household wiring because those wires are in pairs that are opposite polarity. magnet polarity (north or south) matches with the electrical polarity, so if you swap positive and negative on the battery, the field your wire makes will be the opposite of what it was. if you have two wires next to each other, with opposite polarities, their fields will cancel each other out

You are viewing 1 out of 27 answers, click here to view all answers.