Potential Difference in a Uniform Field - Revision history

Yalmonte3: /* The Main Idea */

2020-11-21T21:35:21Z

The Main Idea

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	==The Main Idea==		==The Main Idea==

	Potential difference is the change in electric potential between a final and initial location when work is done on a charge to to affect its potential energy. The unit for electric potential is a volt (which is also joule/coulomb). Approximation of uniform field is useful for simple calculation.		Potential difference is the change in electric potential between a final and initial location when work is done on a charge to affect its potential energy. The unit for electric potential is a volt (which is also joule/coulomb). Approximation of uniform field is useful for simple calculation.
	It is important to remember that since energy is stored in a form of electric field, there will be no potential energy for a single point charge alone; potential energy, thus the potential difference, exists only when there are pairs of interacting particles.		It is important to remember that since energy is stored in a form of electric field, there will be no potential energy for a single point charge alone; potential energy, thus the potential difference, exists only when there are pairs of interacting particles.

Emilypark at 00:15, 10 April 2017

2017-04-10T00:15:03Z

← Older revision		Revision as of 20:15, 9 April 2017
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	By: dachtani3		By: dachtani3

	~~'''CLAIMED BY SHAN SUEN (FALL 2016) (edited main idea, revised mathematical model, added more reference links, edited some connectedness)'''~~
	Claimed by SeongEun Park April, 2017		Claimed by SeongEun Park April, 2017

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	Potential difference is the change in electric potential between a final and initial location when work is done on a charge to to affect its potential energy. The unit for electric potential is a volt (which is also joule/coulomb). Approximation of uniform field is useful for simple calculation.		Potential difference is the change in electric potential between a final and initial location when work is done on a charge to to affect its potential energy. The unit for electric potential is a volt (which is also joule/coulomb). Approximation of uniform field is useful for simple calculation.
			It is important to remember that since energy is stored in a form of electric field, there will be no potential energy for a single point charge alone; potential energy, thus the potential difference, exists only when there are pairs of interacting particles.

	===A Mathematical Model===		===A Mathematical Model===

Emilypark at 00:04, 10 April 2017

2017-04-10T00:04:29Z

← Older revision		Revision as of 20:04, 9 April 2017
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	===Middling===		===Middling===
			figure 1:
	[[File:Slide1.jpg]]		[[File:Slide1.jpg]]

Emilypark: /* Middling */

2017-04-10T00:04:01Z

Middling

← Older revision		Revision as of 20:04, 9 April 2017
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	===Middling===		===Middling===
	Slide1.jpg		[[File:Slide1.jpg]]

	Key Point to remember about signs:		Key Point to remember about signs:

Emilypark at 23:53, 9 April 2017

2017-04-09T23:53:09Z

← Older revision		Revision as of 19:53, 9 April 2017
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	By: dachtani3		By: dachtani3

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	===Middling===		===Middling===
	~~[[File:~~Slide1.jpg]]		Slide1.jpg


	Key Point to remember about signs:		Key Point to remember about signs:

Emilypark: /* Middling */

2017-04-09T23:50:32Z

Middling

← Older revision		Revision as of 19:50, 9 April 2017
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	[[File:Slide1.jpg]]		[[File:Slide1.jpg]]

	~~Slide1.jpg~~

	Key Point to remember about signs:		Key Point to remember about signs:

Emilypark: /* Examples */

2017-04-09T23:46:49Z

Examples

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	===Middling===		===Middling===
			[[File:Slide1.jpg]]

			Slide1.jpg

	Key Point to remember about signs:		Key Point to remember about signs:

Emilypark: /* Middling */

2017-04-09T23:26:14Z

Middling

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	:Ex 2: Figure 1		:Ex 2: Figure 1
	- Consider the path going from point A to point B. The path is in the same direction as the electric field (red arrow).		- Consider the path going from point A to point B. The path is in the same direction as the electric field (red arrow).
	Because ΔV = -		Because ΔV = -E●Δl = -E●Δr(A->B) = -E●d. This then refers ΔV = Vb-Va < 0, meaning that the electric potential is decreasing.

	-If the path is going in the opposite direction of the electric field, electric potential is increasing.		2) If the path is going in the opposite direction of the electric field, electric potential is increasing.

	:Question: Location 1 is at <.1,0,0> and Location 2 is at <.5,0,0>. The uniform electric field is <300,0,0> N/C. The charge travels from Location 2 to Location 1.		:Question: Location 1 is at <.1,0,0> and Location 2 is at <.5,0,0>. The uniform electric field is <300,0,0> N/C. The charge travels from Location 2 to Location 1.
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	:Answer: + 120 V		:Answer: + 120 V

	-If the path is perpendicular to the electric field, electric potential does not change.		:Ex 2: Figure 1
			- Refer back to the figure 1 above. If the path from point C to D was taken, it is going in the opposite direction of the electric field, which means that ΔV > 0;
			therefore, the potential is increasing.

			3) If the path is perpendicular to the electric field, electric potential does not change.

	:Question: Location 1 is at <.1,0,0> and Location 2 is at <.5,0,0>. The uniform electric field is <0,300,0> N/C. The charge travels from Location 1 to Location 2.		:Question: Location 1 is at <.1,0,0> and Location 2 is at <.5,0,0>. The uniform electric field is <0,300,0> N/C. The charge travels from Location 1 to Location 2.
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	:Answer: 0V		:Answer: 0V

			:Ex 2: Figure 1
			- Refer back to the figure 1 above. If the path is going from point B to C, or (point A to D), these points are perpendicular to the electric field. Because no work is required to move a
			a charge between them, all points that are perpendicular to same electric field share same electric potential.

	===Difficult===		===Difficult===

Emilypark: /* Middling */

2017-04-09T23:14:55Z

Middling

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	:Ex: Refer to Simple Example		:Ex: Refer to Simple Example
	:Ex 2: Figure 1		:Ex 2: Figure 1
	- Consider the path going from point A to point B. The path is in the same direction as the electric field (red arrow).		- Consider the path going from point A to point B. The path is in the same direction as the electric field (red arrow).
	Because		Because ΔV = -

	-If the path is going in the opposite direction of the electric field, electric potential is increasing.		-If the path is going in the opposite direction of the electric field, electric potential is increasing.

Emilypark: /* Middling */

2017-04-09T23:13:49Z

Middling

← Older revision		Revision as of 19:13, 9 April 2017
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	Key Point to remember about signs:		Key Point to remember about signs:

	-If the path is going in the direction of the electric field, electric potential is decreasing.		1) If the path is going in the direction of the electric field, electric potential is decreasing.

	:Ex: Refer to Simple Example		:Ex: Refer to Simple Example
			:Ex 2: Figure 1
			- Consider the path going from point A to point B. The path is in the same direction as the electric field (red arrow).
			Because

	-If the path is going in the opposite direction of the electric field, electric potential is increasing.		-If the path is going in the opposite direction of the electric field, electric potential is increasing.