Magnetic Effect of Electric Current
Visualize B-fields from straight wires, coils, and solenoids in 3D. Use the right-hand grip rule as current particles flow.
Parameters
5.0 A
10
0.05 m
Formula
$B = \frac{\mu_0 I}{2\pi r}$
B-field around a long straight wire decreases with distance r.
Computed B
At distance r:
0.05 m
B =
2.00 × 10⁻⁵ T
I
5.00 A
Key Concepts
- Moving charges / currents create magnetic fields.
- Use the right-hand grip rule to find B direction.
- Solenoid field is uniform inside, like a bar magnet.
- More turns & higher current → stronger B-field.