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How can voltage exist without current?
Voltage is sometimes described as the ‘push’ or ‘force’ of the electricity, it isn’t really a force but this may help you to imagine what is happening. It is possible to have voltage without current, but current cannot flow without voltage. current can flow. current cannot flow.
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.
Does voltage flow opposite to current?
The direction of electron flow is from a point of negative potential to a point of positive potential. The direction of positive charges, or holes, is in the opposite direction of electron flow. Then, where the electron current enters the load, the voltage is negative (Figure 31).
Can you have current without voltage and voltage without current?
3 Answers. Voltage, in the most physical way, is a scalar field that determines the potential energy per unit charge at every point in space. Now, you can’t have currents without voltages because if there’s a current there’s a charge moving, and every charge produces a voltage, but you can have currents without voltage differences in space.
What flows is not the voltage but the charge, and that flow is called current. Voltage can be without a current, if you have a single charge, that charge induces a voltage in all space, even if it’s empty. Voltage, in the most physical way, is a scalar field that determines the potential energy per unit charge at every point in space.
When is there no current and no ohm’s law?
Ohm’s law applies only for the current flow through a resistor and the voltage across it.When there is no current flow Ohm’s law is not at all applicable.Ohm’s law is not a relation between unrelated voltage and current. There is a difference between source voltage and voltage drop.( I am going to shock you all!
How is it possible to have high voltage and low current?
The hose gun acts as a varying resistor controlled by the user, so even though there’s high potential energy in the hose (the water wanting to flow), the resistance is so great that little to no water flows. As the user presses the trigger, the resistance lowers until water flows more and more.