What device is used to bypass burnt out bulbs for current measurement?

In the context of checking current flow in a circuit with burnt-out bulbs, the voltmeter is used to measure the electrical potential difference across components, but it's not specifically designed to measure current directly; that’s handled by other devices.

To bypass burnt-out bulbs, tools designed specifically for current measurement, such as an ammeter or a multimeter (when set to current measurement mode), are typically employed. An ammeter measures the current flowing through a circuit, while a multimeter can perform various measurements including current, voltage, and resistance.

Using a voltmeter for this specific scenario would not yield the desired current measurement. Instead, for measuring current directly, using an ammeter or a multimeter is indeed the accurate approach, as these devices can be connected in series with the circuit, allowing the measurement of current even if some bulbs are not functioning.

Therefore, the correct approach is to use an ammeter or a multimeter configured for current measurements, not a voltmeter.