The useful idea
- The useful idea
Voltage, also known as (electrical) potential difference, electric pressure, or electric tension, is the difference in electric potential between two points.
- How it works
In a static electric field, it corresponds to the work needed per unit of charge to move a positive test charge from the first point to the second point.
- Why it matters
In the International System of Units (SI), the derived unit for voltage is the volt (V).
Why this matters
Look for Voltage the next time you notice this pattern in everyday life.
Try this
Look for Voltage the next time you notice this pattern in everyday life.
Test your recall
Which idea belongs to the explanation of Voltage?
- The useful idea — correct
- How it works
- Why it matters
Voltage, also known as (electrical) potential difference, electric pressure, or electric tension, is the difference in electric potential between two points.