The potential difference between two conductors that are insulated from each other is measured in which unit?

The potential difference between two conductors that are insulated from each other is measured in which unit?

• A. Volts
• B. Amperes
• C. Ohms
• D. Joules

Answer: (A)

Potential difference is measured in volts. A volt is the unit of electric potential difference and is defined as the work required to move one coulomb of charge between two points, measured in joules per coulomb. When two conductors are insulated from each other, almost no current flows between them, so a voltmeter (which has high input impedance) can measure the potential difference without pulling current. The other quantities refer to different physical ideas: amperes measure current, ohms measure resistance, and joules measure energy. For example, if moving one coulomb requires one joule of work, the potential difference is one volt.

Potential difference is measured in volts. A volt is the unit of electric potential difference and is defined as the work required to move one coulomb of charge between two points, measured in joules per coulomb. When two conductors are insulated from each other, almost no current flows between them, so a voltmeter (which has high input impedance) can measure the potential difference without pulling current. The other quantities refer to different physical ideas: amperes measure current, ohms measure resistance, and joules measure energy. For example, if moving one coulomb requires one joule of work, the potential difference is one volt.