In electrical terms, tension is more commonly known as voltage, electromotive force (EMF), or potential difference. It represents the electrical potential energy difference between two points in an electrical circuit.
Here's a breakdown of what this means:
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Voltage (Tension): Voltage is the measure of electrical potential difference, typically expressed in volts (V). One volt is defined as the potential difference needed to perform one joule of work per coulomb of charge passed between two points.
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Electromotive Force (EMF): EMF is the voltage generated by a source of electrical energy, such as a battery or generator. It's the "push" that gets electrons moving through a circuit.
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Potential Difference: This is simply the difference in electrical potential between two points. Electrons will flow from an area of higher potential (more negative charge) to an area of lower potential (less negative charge).
In simpler terms: Think of voltage as the "pressure" that pushes electrons through a wire. Higher voltage means more "pressure," leading to a greater flow of electrons (current).
Key Concepts:
- Voltage is what causes current to flow. Without a voltage difference, there is no current.
- Voltage is measured across two points in a circuit.
- Batteries and power outlets provide voltage.
Analogy:
Imagine a water pipe. Voltage is analogous to water pressure. The higher the water pressure (voltage), the more water (current) will flow through the pipe.
Formula Relationship:
Ohm's Law describes the relationship between voltage (V), current (I), and resistance (R):
V = I * R
Where:
- V = Voltage (in volts)
- I = Current (in amperes)
- R = Resistance (in ohms)
In summary, while "tension" might be used colloquially, the more accurate and accepted terms in electrical contexts are voltage, electromotive force (EMF), or potential difference. All these terms describe the driving force that causes electric current to flow in a circuit.
