Which instrument is commonly used to measure electrical quantities such as voltage, current, and resistance?

Which instrument is commonly used to measure electrical quantities such as voltage, current, and resistance?

• A. Multimeter
• B. Drill
• C. Scriber
• D. Caliper

Answer: (A)

To measure electrical quantities such as voltage, current, and resistance you use a device designed for electrical measurements that can switch between different functions. A multimeter fits this purpose because it can read volts, amps, and ohms in one instrument. It’s available in digital or analog form, with you selecting the appropriate function and range, then connecting the test leads accordingly: for voltage you place the probes across the component; for current you place the meter in series with the circuit; for resistance you ensure the circuit is de-energized and place the probes across the component. The other tools are mechanical: a drill makes holes, a scriber marks lines, and a caliper measures dimensions, none of which measure electrical quantities.

To measure electrical quantities such as voltage, current, and resistance you use a device designed for electrical measurements that can switch between different functions. A multimeter fits this purpose because it can read volts, amps, and ohms in one instrument. It’s available in digital or analog form, with you selecting the appropriate function and range, then connecting the test leads accordingly: for voltage you place the probes across the component; for current you place the meter in series with the circuit; for resistance you ensure the circuit is de-energized and place the probes across the component. The other tools are mechanical: a drill makes holes, a scriber marks lines, and a caliper measures dimensions, none of which measure electrical quantities.