Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
| 184_notes:examples:week2_electric_potential_negative_point [2018/01/24 17:46] – [Solution] tallpaul | 184_notes:examples:week2_electric_potential_negative_point [2018/05/17 16:49] (current) – curdemma | ||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ===== Electric Potential from a Negatively Charged Balloon ===== | + | [[184_notes: |
| + | ===== Example: | ||
| Suppose we have a negatively charged balloon with total charge $Q=-5.0\cdot 10^{-9} \text{ C}$. What is the electric potential (also called voltage) at a point $P$, which is a distance $R=20 \text{ m}$ from the center of the balloon? | Suppose we have a negatively charged balloon with total charge $Q=-5.0\cdot 10^{-9} \text{ C}$. What is the electric potential (also called voltage) at a point $P$, which is a distance $R=20 \text{ m}$ from the center of the balloon? | ||
| Line 12: | Line 13: | ||
| We assume $P$ lies outside of the balloon. This is obvious, as $P$ is a distance $R=20 \text{ m}$ away from the center of the balloon. | We assume $P$ lies outside of the balloon. This is obvious, as $P$ is a distance $R=20 \text{ m}$ away from the center of the balloon. | ||
| </ | </ | ||
| - | {{ 184_notes: | + | [{{ 184_notes: |
| ===Goal=== | ===Goal=== | ||
| Line 25: | Line 26: | ||
| <WRAP TIP> | <WRAP TIP> | ||
| === Assumption === | === Assumption === | ||
| - | The electric potential infinitely far away from the balloon is $0 \text{ V}$. /*Read [184_notes: | + | The electric potential infinitely far away from the balloon is $0 \text{ V}$. Read [[184_notes: |
| </ | </ | ||
| - | [184_notes: | ||
| The electric potential at $P$ is given by | The electric potential at $P$ is given by | ||