# What happens to voltage when the circuit is opened

• Engineering
• smart boy
In summary, voltage is the difference in electric potential energy between two points in an electric circuit, measured in volts (V). When a circuit is opened, the voltage decreases to zero because there is no longer a complete path for electrons to flow. If the voltage is too high, it can cause damage and safety hazards. The voltage can change when a circuit is opened, as it is dependent on the flow of electrons. Voltage and current are directly proportional in a circuit, described by Ohm's Law.
smart boy
Hello, everyone.

## Homework Statement

I have a problem in the homework which is about finding the Thevenin equivalent for this circuit:

[PLAIN]http://up.qloob.com/upfiles/8gm66408.bmp
How can I find the Thevenin equivalent circuit with respect to the terminals a, b ?

## The Attempt at a Solution

I tried to use nodal voltage analysis but I stuck.

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## 1. What is voltage?

Voltage, also known as electric potential difference, is a measure of the difference in electric potential energy between two points in an electric circuit. It is measured in volts (V).

## 2. How is voltage affected when a circuit is opened?

When a circuit is opened, the flow of electrons is interrupted and therefore, the voltage across the circuit decreases to zero. This is because there is no longer a complete path for the electrons to flow through.

## 3. What happens if the voltage is too high?

If the voltage in a circuit is too high, it can cause damage to the components in the circuit and potentially create a safety hazard. It is important to use the correct voltage for the specific circuit and to have proper safety measures in place.

## 4. Can the voltage change when a circuit is opened?

Yes, the voltage can change when a circuit is opened. This is because the voltage is dependent on the flow of electrons through the circuit. When the circuit is opened, the flow of electrons is interrupted and the voltage decreases.

## 5. How does the voltage in a circuit relate to current?

Voltage and current are directly proportional in a circuit. This means that as the voltage increases, the current will also increase, and vice versa. This relationship is described by Ohm's Law: V = IR, where V is voltage, I is current, and R is resistance.

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