Which is the best device to measure e.m.f. of a cell:
Potentiometer best for emf, no current drawn at null, more accurate than voltmeter.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
#potentiometer
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Which value cannot be measured by potentiometer?
Potentiometer measures emf and potential difference, not current directly.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
