Can Volts Be Negative?

The magnitude of a voltage can be either positive 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. ... Voltage is measured using a voltmeter.

What does it mean when voltage is negative?

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.

Is voltage positive or negative?

To say you have a voltage of +5V at point A means that point A is 5 volts more positive than your chosen ground. To say you have a voltage of -5V at point B means that 'ground' is 5 volts more positive than point B. The sign just tells you the polarity of the voltage, with respect to the ground node.