Question

Which of the following options correctly describe the units used to express electrical potential, charge, and electrical energy? Select all that apply.

Multiple select question.

1. The volt is the unit for electrical potential.
2. Electrical energy can be measured in joules.
3. The coulomb is the unit for cell emf.
4. The unit for the electrical charge has the symbol F.
5. 1 joule = 1V1C

Answer 1

The unit for electrical potential is the volt (V), for electrical charge it is the coulomb (C), and for electrical energy, it is the joule (J). The farad (F) is not a unit of charge but of capacitance, and an electron volt is a unit of energy, not potential.

Step-by-step explanation:

The units used to express electrical potential, charge, and electrical energy are fundamental in understanding electricity.

• The volt is indeed the unit for electrical potential, equating to one joule per coulomb (1 V = 1 J/C).
• Electrical energy can be measured in joules; it's the standard unit of energy in the International System of Units (SI).
• The unit for electrical charge is the coulomb (C), not the farad (F), which is actually the unit of capacitance. Therefore, the statement about the coulomb being the unit for cell emf is incorrect.
• The symbol F is indeed associated with capacitance, not charge, which is measured in coulombs.
• The relationship 1 joule = 1 volt × 1 coulomb (1 J = 1V1C) correctly describes the energy of one coulomb of charge at a potential of one volt.

Additionally, volts and electron volts differ as units. A volt is a unit of electrical potential or electromotive force while an electron volt is a unit of energy equal to the energy acquired by a single electron when it accelerates through an electric potential difference of one volt.