# Open circuit examples

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Examples of how to use “open circuit” in a sentence from the Cambridge Dictionary Labs.

You need a closed path, or closed circuit, to get electric current to flow. If there's a break anywhere in the path, you have an open circuit, and the current stops.

1a. Find the value of the open circuit voltage, Voc and Thevenin resistance, Rth. Figure 1 The circuit considered in Example 1. Solution: The circuit from Figure.

By the definition of an ideal wire the voltage at those two points must be the same the voltage difference must be zero. In the example below, the resistance R 2 does not affect this voltage and the resistances R 1 and R 3 form a voltage divider , giving Thevenin resistance. Related Questions What is the difference between an open circuit and a short circuit? What is an open circuit? If you are disconnecting any wire of them then this will be an open circuit and of course lamp will switch off.

## What is Open Circuit Voltage?

Open circuit voltage or potential is voltage which is not connected to any load in a circuit. See the two examples below to see the difference between open circuit voltage with a voltage source which is in a closed circuit and connected to a load. As you can see, open circuit voltage is disconnected and does not form a complete circuit. This is why it is called open. It is open and not connected to a form a complete electrical path. Open Circuit Voltage Represents a Voltage Source's Full Voltage Because it doesn't drop any voltage across a load, as what would happen when it is connected to a load, a voltage source's open circuit voltage represents its full voltage value, since the voltage doesn't share any of its voltage with a load.

A prime example below are these two battery circuits: The battery to the left is unconnected to any load. Assuming that this 1. The battery to the right, now, is connected to a load.

Again, assuming that this battery has full life of 1. Open Circuit Voltage Is Real Voltage There is a misconception many times that because a voltage source isn't connected to a circuit or load, the voltage doesn't really exist or its power doesn't go into effect until it is connected to a closed circuit path.

However, this is erroneous. A voltage source does not need to be connected to anything for voltage to exist.

Voltage unconnected is real voltage. Even if a voltage source is unconnected and not attached to any load, the potential power still exists.

A prime example of this is the voltage which comes out of a wall outlet. Even when nothing is plugged into the wall outlet, the potential across the power terminal's power supply and ground of the outlet will still measure VAC with nothing connected. The hazard of getting shocked from a wall outlet is still there.

This misconception may stem from the fact that current can only flow when it is in a closed circuit. However, voltage is different. While current can only exist when a circuit is closed, voltage always has potential.

What is Negative Voltage? What is Open Circuit Voltage?