Formula Sheet - PHY2054 Formulas: Sheet 1 Chapter 15...

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PHY2054 Formulas: Sheet 1 Chapter 15 (Electric forces and fields, Gauss’ law) Coulomb’s Law 22 0 ˆˆ 4 kQq Qq rr πε =≡ Fr r (point charge) ˆ r = unit vector from Q to q . Electric field q = FE (general) 0 4 kQ Q Er r (single point charge Q ) 2 ˆ i i i i kq r = (sum over point charges) Gauss’ law encl 0 Ei i i Q ε Φ= ⋅ = EA "electric flux" E Φ = Chapter 16 (Electric potential, capacitors) Work () 11 f if i f i WK K m v m v =⋅ − = − = Fx x Conservative force ( ) f i f i i i f f UU KK U K U K −= = →+= + (energy conservation) Electric potential 0 (general) (point charge ) 4 Uk Q Q VV Q qr r == Potential difference ( ) f i VV V Δ≡ − = −⋅ − Ex x Capacitors 0 A Cq C V d 2 0 (energy) (energy density) 2 EE q UC V u E C = Capacitors (cont) eq 1 2 eq 1 2 1 (parallel) (series) EV EVC C C C C CC C κ κκ →→→ = + = + Chapter 17 – 18 (Electric current, circuits)
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This note was uploaded on 03/18/2009 for the course PHY 2054 taught by Professor Avery during the Spring '08 term at University of Florida.

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