This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Things you must know Relationship between electric field and electric force Relationship between magnetic field and magnetic force Electric field of a point charge Conservation of charge Magnetic field of a moving point charge The Superposition Principle Other Fundamental Concepts Δ U el = q Δ V Δ V =- f i ' E • d ' l ≈ - ∑ ( E x Δ x + E y Δ y + E z Δ z ) Φ el = ' E • ˆ ndA Φ mag = ' B • ˆ ndA ' E • ˆ ndA = ∑ q inside ' B • ˆ ndA = 0 | emf | = ' E NC • d ' l = d Φ mag dt ' B • d ' l = μ ∑ I inside path + d dt ' E • ˆ ndA Specific Results ' E due to uniformly charged spherical shell: outside like point charge; inside zero ' E dipole,axis ≈ 1 4 π 2 qs r 3 (on axis, r s ) ' E dipole, ⊥ ≈ 1 4 π qs r 3 (on ⊥ axis, r s ) ' E rod = 1 4 π Q r r 2 + ( L/ 2) 2 ( r ⊥ from center) p = qs electric dipole moment ( p = αE ) ' E rod ≈ 1 4 π 2 Q/L r (if r L ) ' E ring = 1 4 π qz ( z 2 + R 2 ) 3 / 2 ( z along axis) ' E disk = Q/A 2 1- z ( z 2 + R 2...
View Full Document
- Winter '10
- Electron, Electric charge, point charge, Erad