Which equipment is commonly capable of measuring Ohms, Amps, and Volts?

• A. Voltmeter
• B. Oscilloscope
• C. Ammeter
• D. Multimeter

Answer: (D)

A single handheld tool that can measure multiple electrical quantities is the multimeter. This device combines three measurement functions: voltmeter to read voltage, ammeter to measure current, and ohmmeter to determine resistance. In practice, you measure voltage by placing the probes across a component to read the potential difference, measure current by placing the meter in series in the circuit so the current flows through it, and measure resistance by de-energizing the circuit and touching the probes across the component to determine how much resistance it offers.

This makes it the best answer because it can handle all three measurements in one instrument, which is essential for diagnosing and troubleshooting electrical and electronic systems. The voltmeter alone reads voltage but doesn’t typically measure current or resistance. The ammeter alone measures current. An oscilloscope can display voltage signals and analyze waveforms, but it isn’t a direct, reliable tool for measuring resistance, and measuring DC current or Ohms with it requires additional setup and peripherals.