# What is the danger if your hair suddenly stands up?

## Presentation on theme: "What is the danger if your hair suddenly stands up?"— Presentation transcript:

What is the danger if your hair suddenly stands up?
9 電磁 II What is the danger if your hair suddenly stands up?

9-1.1 電位能 Fe and Fg are mathematically identical
Fe is a conservative force

9-1.2 電位 Ue depends on q, but Ve does not

9-1.2 等位面 Four Equipotential Surfaces

9-1.3 等位面3例 E.S. for a uniform field, a point charge, and an electric dipole

9-1.4 由電場算電位 The differential work done by F

Ex. 1 均勻電場 (a) Along path (a)

Ex. 1 均勻電場︰路徑(a)

Ex. 1 均勻電場︰路徑(b)

9-1.5 點電荷的電位

9-1.6 一組點電荷的電位 The principle of superposition

Ex.2 12 electrons on a circle on an arc

9-1.7 電雙極的電位

Induced Dipole Moment

9-1.8 連續電荷分佈的電位

Line of Charge

Charged Disk

9-1.9 由電位算電場 The work done by the electric field

Ex.3 The charged disk

9-1.10一組點電荷的電位能 For charges q1 and q2 SP25-8 Three charges

Ex.4 An alpha particle and a gold nucleus

9-1.11 Potential of a charged isolated conductor

Discharge

Plots of E (r) and V(r)