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_positive_point [2018/01/24 17:03] – tallpaul | 184_notes:examples:week2_electric_potential_positive_point [2018/05/17 16:48] (current) – curdemma | ||
---|---|---|---|
Line 1: | Line 1: | ||
- | ===== Electric Potential from a Positively Charged Balloon ===== | + | [[184_notes: |
- | Suppose we have a positively charged balloon with total charge Q=5⋅10−9 C. What is the electric potential (also called voltage) at a point P, which is a distance R=50 cm from the center of the balloon? | + | ===== Example: |
+ | Suppose we have a positively charged balloon with total charge $Q=5.0\cdot 10^{-9} \text{ C}.Whatistheelectricpotential(alsocalledvoltage)atapointP,whichisadistanceR=50 \text{ cm}$ from the center of the balloon? | ||
===Facts=== | ===Facts=== | ||
- | * The balloon has total charge Q=5⋅10−9 C. | + | * The balloon has total charge $Q=5.0\cdot 10^{-9} \text{ C}$. |
* The point P is a distance R=50 cm away from the center of the balloon. | * The point P is a distance R=50 cm away from the center of the balloon. | ||
* The electric potential due to a point charge can be written as V=14πϵ0qr, where q represents the charge and r is the distance. | * The electric potential due to a point charge can be written as V=14πϵ0qr, where q represents the charge and r is the distance. | ||
Line 13: | Line 14: | ||
</ | </ | ||
- | {{ 184_notes: | + | [{{ 184_notes: |
===Goal=== | ===Goal=== | ||
Line 26: | Line 27: | ||
<WRAP TIP> | <WRAP TIP> | ||
=== Assumption === | === Assumption === | ||
- | The electric potential infinitely far away from the balloon is 0 V. Read [184_notes: | + | The electric potential infinitely far away from the balloon is 0 V. Read [[184_notes: |
</ | </ | ||