Which instrument is commonly used to measure both AC and DC voltage and resistance?

• A. Voltmeter
• B. Clamp Meter
• C. Multimeter
• D. Ammeter

Answer: (C)

The multimeter is a versatile instrument capable of measuring multiple electrical parameters, including both alternating current (AC) and direct current (DC) voltage, as well as resistance. This makes it particularly useful for a wide range of applications in both electrical engineering and troubleshooting in various electrical systems.

Multimeters come in two main types: analog and digital. Digital multimeters (DMMs) are particularly common due to their ease of use and ability to provide precise readings. By having the ability to switch between different measurement functions, users can effectively assess voltages and resistances in circuits without needing multiple separate devices.

Other instruments, such as voltmeters, specifically measure voltage but lack the multi-functionality of a multimeter. Clamp meters are designed primarily for measuring current and might have limited voltage measurement capabilities, but they do not typically measure resistance. Ammeters focus solely on measuring current and cannot measure voltage or resistance. Therefore, the multimeter's comprehensive functionality makes it the best choice for measuring both AC and DC voltage and resistance.