Which unit expresses work per unit charge?
Correct answer: A. Volt
- A. Volt
- B. Ampere
- C. Coulomb
- D. Watt
Explanation
This is the correct answer. The unit of work per unit charge is the volt. One volt is defined as one joule of work done per coulomb of charge. Mathematically, it can be expressed as: 1 volt = 1 joule / 1 coulomb Therefore, the volt is the appropriate unit for expressing work per unit charge.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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