Physics 2220 Equations: Coulomb's Law, Capacitance, Resistance, Inductance, Magnetic Field, Study notes of Physics

Download Physics 2220 Equations: Coulomb's Law, Capacitance, Resistance, Inductance, Magnetic Field and more Study notes Physics in PDF only on Docsity! 1 PHYSICS 2220 Equation Sheet #2 1. Coulomb’s law: F = k |q1||q2| r2 k = 1 4πε◦ 2. FE = qE For point charge, E = k |q| r2 3. C = Q ∆V C = ε◦A d ∆V = Ed Parallel: Ceq = C1+C2+. . . Series: 1 Ceq = 1 C1 + 1 C2 . . . or Ceq = C1C2 C1 + C2 (2 only) 4. V = iR P = iV = i2R = V 2 R R = ρL A 5. Parallel: 1 Req = 1 R1 + 1 R2 + . . . Req = R1R2 R1 +R2 (2 only) Series: Req = R1 +R2 + . . . 6. Kirchhoff’s rules: 1) current in = current out; 2) sum of voltage rises and drops = 0 around a closed loop 7. q = q◦e−t/RC q = q◦ ³ 1− e−t/RC´ i = i◦e−t/RC τ = RC 8. U = 1 2 CV 2 = 1 2 Q2 C = 1 2 QV ue = 1 2 ε◦E2 9. FB = qv ×B |FB| = |q||v||B| sinφ F = qE+ qv ×B 10. r = mv qB T = 1 f = 2πr v 11. FB = iL×B |FB| = i|L||B| sinφ τ = NiAB sin θ 12. k = 8.99× 109 N·m2/C2 ε◦ = 8.85× 10−12 C2/N·m2 g = 9.8 m/s2 e = 1.60× 10−19 C 1 eV = 1.60× 10−19 J c = 3× 108 m/s 13. electron mass me = 9.11× 10−31 kg proton mass mp = 1.67× 10−27 kg 14. Circle: C = 2πr A = πr2