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Solenoid & Toroid Field
AP Physics 2 · Unit 12 Electromagnetism
Learning Objectives
Solenoid: B = μ₀nI (uniform inside)
Toroid: B = μ₀NI/(2πr) (inside)
B ≈ 0 outside ideal solenoid
Field confined inside toroid
Tags
solenoid
toroid
magnetic field
Ampere's law
AP Physics 2
Type
Solenoid
Toroid
Current I (A)
2
Turns N
100
Length/Radius (cm)
20
Results
B inside
0
n (turns/m)
0
B outside
≈ 0
Flux Φ (Wb)
0