Electric field and potential

38
0
Hi,

I don't understand why dV/dr=-E

As far as I know:
V=kq/r
E=Kq/(r^2)
so V/r becomes to be E and not -E.
 
38
0
ohh I should derivate the function!! thank you :)
 

The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top