Question

Why is the potential difference between the terminals of a battery is not always equal to the e m f of a battery
The voltage across a battery is equal to
the e m f of the battery only when there
is no load on the battery.

When a resistive load is connected across the terminals, a portion of the
voltage is lost across the internal
resistance of the battery.

Related Questions

When does the potential difference between the two terminals of the battery be zero? I think it wi... When a battery is not used in a circuit, a voltmeter measure 1.492V across the terminals of the batt... A battery has an unknown e.m.f, ε,and an internal resistance r = 0.40Ω. When a resistance R = 5.60Ω... The potential difference across the terminals of a storage battery not connected in any circuit is o...