Question

Why is voltmeter less accurate in measuring potential difference than a potentiometer?

Answer 1

Voltmeter basically measures the potential drop or the voltage in the circuit. ... Thus, a voltmeter is not a preferred instrument as it only worked in a close circuit. So, to measure emf (open circuit voltage) a potentiometer is used which can work in open circuit conditions.

Answer 2

Voltmeter basically measures thepotential drop or the voltage in the circuit. ... Thus, a voltmeter is not a preferred instrument as it only worked in a close circuit. So, to measure emf (open circuit voltage) a potentiometeris used which can work in open circuit conditions.