Final answer:
A digital meter can measure current without direct contact, using null measurements for high accuracy and minimal circuit impact.
Step-by-step explanation:
A digital meter can measure current without making direct contact with wires, unlike the conventional analog meters with galvanometers. These modern meters utilize advanced techniques such as null measurements, which do not draw any current, thereby not affecting the circuit's operation. Digital meters are more accurate because they can detect smaller currents, using solid-state electronics to achieve high accuracies of up to one part in 106. In contrast, analog meters rely on a galvanometer that produces needle deflection proportional to the current flow, which makes them less accurate and more intrusive in the measurement process.
Digital meters offer numerical readouts, making them easier to read than the swiveling needle of an analog meter. Additionally, digital technology allows for more precise measurements and is less likely to be affected by external variables like magnetic fields, which can influence the galvanometer in analog meters.