Energy per unit charge between two points; the push that drives current.
Voltage (potential difference) is the energy per unit charge between two points: V=W/Q. It drives current through a circuit. A voltmeter is connected in parallel. Voltage is always relative to a reference such as ground.
A 12 V battery gives 12 J to every coulomb passing through.
Voltage is the energy each unit of charge gains or loses, so it determines how much work a circuit can do and how much insulation is needed.
Energy per unit charge between two points; the push that drives current.
Voltage is the energy each unit of charge gains or loses, so it determines how much work a circuit can do and how much insulation is needed.
No. Voltage is a potential difference between two points. It drives current when a path exists, but it does not flow itself.
It is a chosen zero-volt point against which other voltages are measured. Any point can serve as the reference, but it must be consistent.
Typical applications include checking that a battery matches a 12 V motor, choosing the voltage rating of a capacitor for a power supply and estimating the insulation needed for a 400 V distribution line.
Study "Current" first (topic 2 of 106 in Electrical Engineering). It covers the groundwork this topic builds on.
1 V = 1 J/C. Sources raise potential, loads drop it. EMF vs terminal voltage.
A 12 V battery gives 12 J to every coulomb passing through.
The next topic is "Resistance", which builds directly on this one.
It is classed as Beginner in Electrical Engineering (topic 3 of 106). It is an entry-level topic. It relies only on basic school mathematics and the ideas introduced earlier in this discipline.
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