What is potential difference measured in?

Potential difference is the work done per unit charge. A potential difference of 1 Vmeans that 1 joule of work is done per coulomb of charge. ( 1 V = 1 J C-1) Potential difference in a circuit is measured using a voltmeter which is placed in parallel with the component of interest in the circuit.

The potential difference is the work done per unit charge. A potential difference of 1 V means that 1 joule of work is done per coulomb of charge. ( 1 V = 1 J C-1) The potential difference in a circuit is measured using a voltmeter which is placed in parallel with the component of interest in the circuit.

Source: physicsnet.co.uk

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.

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