All formulas and usages of high school physics electric field

All formulas and usages of high school physics electric field

10、 Electric field
1. Two kinds of charge, charge conservation law, elementary charge: (E = 1.60 × 10-19c); the charge quantity of charged body is equal to the integral multiple of elementary charge
2. Coulomb's Law: F = kq1q2 / R2 (in vacuum) {F: force between point charges (n), K: electrostatic constant, k = 9.0 × 109n? M2 / C2, Q1 and Q2: electric quantity of two point charges (c), R: distance between two point charges (M), direction on their connecting line, force and reaction force, mutual repulsion of the same kind of charges, mutual attraction of different kinds of charges}
3. Electric field strength: e = f / Q (definition formula, calculation formula) {e: electric field strength (n / C), is vector (superposition principle of electric field), Q: electric quantity of inspection charge (c)}
4. The electric field formed by the vacuum point (source) charge e = KQ / r2 {R: the distance from the source charge to the position (m), Q: the electric quantity of the source charge}
5. The field strength of uniform electric field E = UAB / D { UAB:AB The voltage (V) between two points, D: the distance (m) of AB two points in the direction of field strength}
6. Electric field force: F = QE {F: electric field force (n), Q: electric quantity of electric charge (c), e: electric field intensity (n / C)}
7. Potential and potential difference: UAB = φ a - φ B, UAB = WAB / Q = - Δ EAB / Q
8. Work done by electric field force: WAB = quab = eqd {WAB: work done by electric field force when charged body is from a to B (J), Q: charge (c), UAB: potential difference between a and B in electric field (V) (work done by electric field force is independent of path), e: intensity of uniform electric field, D: distance between two points along the direction of electric field strength (m)}
9. Electric potential energy: EA = q φ a {EA: electric potential energy of charged body at point a (J), Q: electric quantity (c), φ A: electric potential at point a (V)}
10. Change of electric potential energy Δ EAB = eb-ea {difference of electric potential energy of charged body from a position to B position in electric field}
11. Work done by electric field force and change of electric potential energy Δ EAB = - WAB = - quab (the increment of electric potential energy is equal to the negative value of work done by electric field force)
12. Capacitance C = q / u (definition formula, calculation formula) {C: capacitance (f), Q: electric quantity (c), u: voltage (potential difference between two plates) (V)}
13. Capacitance of parallel plate capacitor C = ε s / 4 π KD (s: opposite area of two plates, D: vertical distance between two plates, ω: dielectric constant)
Common capacitors [see P111, Volume 2]
14. Acceleration of charged particles in electric field (VO = 0): w = Δ EK or Qu = mvt2 / 2, VT = (2qu / M) 1 / 2
15. Deflection of charged particles in the direction perpendicular to the electric field at the velocity VO into the uniform electric field (without considering the effect of gravity)
Quasi plane vertical electric field direction: uniform linear motion L = VOT (in parallel plates with equal amount of heterogeneous charges: e = u / D)