___ are used to detect spike voltages, or currents of short duration, or sudden drops in voltage, current, or power.

• A. Recording meters
• B. Analog meters
• C. Digital meters
• D. Voltmeters

Answer: (A)

Transients—spikes, short bursts, or sudden drops—need a tool that logs how a quantity changes over time. Recording meters are built to capture measurements over a period, so they can show spike voltages, short-duration currents, or quick dips in voltage, current, or power as they happen. This time-based record lets you see both how large the event is and how long it lasts, which a single instantaneous reading often misses. By comparison, analog and digital meters typically display one momentary value, and a voltmeter measures voltage specifically, not the broader changes in current or power over time. So recording meters are the best fit for detecting transient events.