Determining Field from Potential
3.4 Determining Field from Potential
By the end of this section, you will be able to:
- Explain how to calculate the electric field in a system from the given potential
- Calculate the electric field in a given direction from a given potential
- Calculate the electric field throughout space from a given potential
Relating Electric Field and Electric Potential
The electric field is equal to the negative gradient of the electric potential:
where the del operator is:
|Two points A and B are located within a region in which there is an electric field.|
How would you describe the potential difference ∆V = VB − VA?
|A proton is placed at position P on the x axis where the potential is -10V.|
Which of the following statements is true?
|A proton is released from rest at point B, where the potential is 0 V.|
Afterward, the proton … ?
|In a certain region of space, the electric potential is +2 V everywhere along the x axis. From this information, you can conclude that the x component of the electric field in this region:|