PhysicsMagnetic Effects of Electric Current

Solenoid Magnetic Field

Change turns and current to strengthen an electromagnet.

Turns per metre1000

Current2 A

Field B = μ₀nI

2.513mT

B (mT)2.51

Magnetic field around the currentField B = μ₀nI: 2.513 mT

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The field inside a long solenoid is uniform and behaves like a bar magnet outside.

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