Tagged Questions
1
vote
1answer
113 views
Is my electric power cord creating magnetic field when coiled?
Simple question. But I was wondering, does my mac power cord create a magnetic field when its all coiled?
5
votes
0answers
189 views
Neodymium Electromagnet?
I am interface designer that occasionally steps out and does some product/concept design. The last one I'm working on is something that would require me to make a matrix of little electro magnets, and ...
2
votes
2answers
378 views
A wobbly pan on an induction cooker, is it less effective?
According to the Wikipedia, one of the limitations of the induction cooker is that the bottom surface of the pot should be flat.
Accordingly, I commented on a question on Seasoned Advise, but I'd ...
0
votes
1answer
110 views
Is a low-current electrical arc harmful to humans?
I've heard that electrical flux non-destructive particle testing machines are considered safe because they use less than 2 amps. I have seen an arc created between two objects do considerable damage, ...
3
votes
0answers
94 views
Can you safely draw sparks from the nose of an electrified boy?
From Purcell's Electricity and Magnetism
A spectacular conclusion of one of the popular exhibitions of the time
was likely to be the electrification of a boy suspended by many silk
threads ...
3
votes
1answer
177 views
What Is the Noise of an MRI Machine
What is the source of the loud noise of an MRI medical scanning machine? Is it due to some mechanical moving parts such as pumps, or is it an effect, similar to magnetostriction of superconducting ...
4
votes
1answer
132 views
The feeling of fuzz on the display surface of a Cathode Ray Tube Television
I was always wondering where the feeling of fuzz comes from when touching a CRT (Cathode Ray Tube) television on its display screen when the TV is turned on. Can someone please explain why I feel ...
