Question

How do you know if a voltage is negative?

Answer 1

Here is my answer

A negative voltage is a relative excess of electrons compared to some other point. If 0 V is no voltage. Negative voltage is an excess of electrons and positive voltage is a deficiency of electrons.20-Jan-2016

Answer 2

Explanation:

the magnitude of the voltage can be either position or negative.if the voltage magnitude is positive,the voltage has the same polarity as shown on the diagram.if the voltage magnitude is negative,the voltage polarity is the opposite to that shown on the diagram