Which voltage is not caused by a source of emf?
A)the voltage across a charged capacitor
B)the voltage across two copper-iron junctions at different temperatures
C)the voltage across the terminals of a dry cell battery
D)the voltage from an electric generator

Question

Quizplus · Accepted Answer

The voltage across a charged capacitor is not caused by a source of emf. It is the result of the accumulation of charge on the plates of the capacitor, which creates an electric field between them. The other choices, B, C, and D, are all examples of voltages that are caused by sources of emf.

Which Voltage Is Not Caused by a Source of Emf