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

620 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

the electric fields are teeny-tiny, so there *is* an attraction but it’s not noticeable.

I worked one summer in an EE lab for one of my profs. My task was to measure the field strength over a linear inductive motor. (LIM). A LIM is basically a set of wire coils, which set up a magnetic field, on the ground, with a motor whose electrical frequency is synced up with field. I was trying to measure how high the voltage was a few inches above the coils.

Couldn’t get the readings. Our lab was near a busy streetcar line, which runs on 600VDC. As the cars passed by the contacts on the overhead lines, they’d generate transients which blew our readings all to hell. I was getting readings near 1-2 microvolts with no streetcars, and 10-20 when the cars were busy. A month, and we never got any useful data.

And I’d note these coils were designed to create a higher intensity field than any single wire, so the field produced by one wire would be even weaker.

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