3
\$\begingroup\$

We have a relation between Electric field(E) and potential(V) as

E = -∇V and V = -Integral (E)dl

In such case, V have to be equal to -E.D ::: V = -E.D but in most cases we use V=E.D. Why is this?

\$\endgroup\$

2 Answers 2

1
\$\begingroup\$

Think of it like this: -

enter image description here

Ignoring the negative sign is done quite often and this slightly corrupt act is also seen in magnetics (V = L.di/dt) instead of the version with a negative sign.

\$\endgroup\$
0
2
\$\begingroup\$

The correct expression is the first one

https://en.wikipedia.org/wiki/Electric_potential

You use the second one only if you just care of the absolute value.

\$\endgroup\$
0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.