What does it mean when you have voltage but no current?

When one point is more charged with electric than the other, that’s voltage. If the waterfall is dry and thee is no Current, the difference between two points is still there. One point is higher than the other (one point is more electrically charged than the other). That’s voltage without current.

Can transformer have voltage but no current?

So, if there is no current flow between two points, it simply implies that there is no voltage difference between them. Thus, a voltage always exists, it may either be positive, negative or zero between two points, but the flow of current depends only on the voltage gradient between them.

What is the effect of voltage on current?

The current is directly proportional to the voltage and inversely proportional to the resistance. This means that increasing the voltage will cause the current to increase, while increasing the resistance will cause the current to decrease.

What causes low voltage in transformer?

Age and corrosion are a common cause of low voltage, as is dirty connections and poor insulation. Poor or damaged splicing work can also be a cause. In some cases, the wires used to carry electricity have a lower gauge than is necessary. Low voltage problems could be the result until the wires are replaced.

Can a voltage 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.

Can you have voltage without resistance?

Voltage can certainly exist without resistance. If you have an electric field in empty space (or, for example, in a capacitor) there will be a potential difference even though there are no resistors around.

Why are my LED lamps not working?

This is why you typically see this as an issue with low voltage (12- or 24-volt) LED lamps. The driver regulates either the current or the voltage being delivered to the LEDs. Using the wrong driver can deliver either too much current or too little, leading to one of these two driving states. Underdriving an LED

What happens if the voltage is too low?

The electric utility slightly decreases the amount of voltage being fed into the system to compensate for the high demand. Low voltage is not a problem for most appliances. Older appliances that use motors, such as refrigerators and dryers, may be in danger of having their motors overheat.

Can too much voltage kill an led?

However things are really not that simple. First off, an LED is a current driven device, not a voltage driven device. That is, it doesn’t really care what the voltage is, but it does care what the current is. Of course, too much voltage will kill it – but too much current, regardless of the voltage, will kill it.

How do LEDs affect the voltage of a battery?

The LED also has a resistance as do all of the wiring in your circuit. The voltage drops across all of these resistors plus the LED’s intrinsic voltage drop will add up to the battery voltage. The only question is: At what current does this happen?