{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ch19_print

# ch19_print - Electrical Potential Energy and Electric...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Electrical Potential Energy and Electric Potential 1 – Potential Energy and Electric Potential The Coulomb force law is of the same form as the universal law of gravity → the electrostatic force is a conservative force. Example: A small positive test charge, q , in a uniform electric field E : Work done by gravity: W = F · s = mg ( h- h ) Work done by constant elec. force: W = F · s = | q | E · s Work=Change in PE : W =- Δ GPE = GPE- GPE W =- Δ EPE = EPE- EPE Dr.D.Wackeroth Spring 2005 PHY102A Electrical Potential Energy and Electric Potential • A positive charge gains electric potential energy when it is moved in a direction opposite the electric field. • A negative charge loses electric potential energy when it is moved in a direction opposite the electric field. Energy Conservation: W = 0 J ⇒ Δ E = E- E = 0 J The total energy, E , of the universe does not change. Energy can only be transformed between different forms of energy but can never be destroyed or created out of nothing. E = 1 2 mv 2 + 1 2 Iω 2 + mgh + 1 2 kx 2 + EPE (1) Dr.D.Wackeroth Spring 2005 PHY102A Electrical Potential Energy and Electric Potential Electric Potential: The potential difference between points A and B , Δ V = V- V , is defined as the change in electric potential energy of a charge, q , moved from A to B , divided by the charge....
View Full Document

{[ snackBarMessage ]}

### Page1 / 6

ch19_print - Electrical Potential Energy and Electric...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online