- #1
noname12345
- 31
- 4
Hopefully, a simple question with a simple answer.
I have a flat magnet (assume infinite long and wide) with a field strength at the surface of (for simplicity) exactly 1Tesla.
What will the field strength be (in air) 1mm away from that surface?
I know approximates to 1/r^3, but 1/0.001^3 = 1e9.
The field strength will reduce, so ?divide? 1T / 1e-9; obviously not! It reduces, but not that fast.
So, what then? A formula and worked example would be very helpful.
Thanks, Buk.
Update: I found this formula: B = µ0 / 4π * 2µ / d3
d= distance in meters; µ0 = 4πe-7; and µ is defined as "the magnetic moment"; but no further explanation.
Is that a universal constant (like µ0) I can look up; or a constant to do with ?
I have a flat magnet (assume infinite long and wide) with a field strength at the surface of (for simplicity) exactly 1Tesla.
What will the field strength be (in air) 1mm away from that surface?
I know approximates to 1/r^3, but 1/0.001^3 = 1e9.
The field strength will reduce, so ?divide? 1T / 1e-9; obviously not! It reduces, but not that fast.
So, what then? A formula and worked example would be very helpful.
Thanks, Buk.
Update: I found this formula: B = µ0 / 4π * 2µ / d3
d= distance in meters; µ0 = 4πe-7; and µ is defined as "the magnetic moment"; but no further explanation.
Is that a universal constant (like µ0) I can look up; or a constant to do with ?
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