lec33

PHYS 1750: SELECTED TOPICS in PHYSICS
LECTURE 33. Magnetic Forces on Currents

21.7-8. Force on Currents

1. F/L = B*I*sin(θ_B-I)

2. Torque = B*I*A*sin(θ_{B-A_⊥})

21.9. Field from a Current

1. Ampere's law: B*2π*r = μ_o*I

2. B = μ_o*I /2π*r

μ_o = 4π x 10^-7 T*m/A permeability

21.10. Parallel Wires and Loops

1. F/L = μ_o I₁I₂ /2π*d

2. Loops and solenoids: B = μ_o*N*I/L

21.2. Magnetic Materials

1. Little loops

2. Why there are no monopoles

Review Questions
Lecture 34: Faraday Inductance

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21.7-8.	Force on Currents
	1.	F/L = BI**sin(θ_B-I)
	2.	Torque = BIA*sin(θ_{B-A_⊥})
21.9.	Field from a Current
	1.	Ampere's law: B2πr = μ_o*I
	2.	B = μ_oI /2πr
		μ_o = 4π x 10^-7 Tm/A permeability*
21.10.	Parallel Wires and Loops
	1.	F/L = μ_o I₁I₂ /2π*d
	2.	Loops and solenoids: B = μ_oNI/L
21.2.	Magnetic Materials
	1.	Little loops
	2.	Why there are no monopoles