Magnetic field at center of circular loop (B = μ₀I/(2R))
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B = μ₀I/(2R)
What each symbol means
| Symbol | What it stands for |
|---|---|
| B | Field at geometric center (T) |
| I | Current (A) |
| R | Radius of loop (m) |
When to use this
Planar circular loop, vacuum, all current contributes — single turn; N turns → multiply by N.