Multirange Voltmeters are designed to use one meter movement to measure several ranges of voltage.

Multirange Voltmeters are designed to use one meter movement to measure several ranges of voltage.

• A. Multirange Voltmeters
• B. Wattmeter
• C. Oscilloscope
• D. Ammeter

Answer: (A)

The idea being tested is how a voltmeter can cover several voltage ranges using one movement by scaling the input with internal resistors. A multirange voltmeter uses the same meter movement (the same full‑scale current) but switches in different resistors or attenuator networks so that different input voltages produce the same deflection on the meter. On a higher range, more resistance is in series, so a larger voltage is needed to reach full-scale; on a lower range, less resistance allows a smaller voltage to reach full-scale. Each range is calibrated so the pointer reading corresponds to the correct voltage for that range. Other instruments don’t use this single-movement, multi-range approach for voltage: a wattmeter measures power, an oscilloscope measures waveforms with different scales and operating principles, and an ammeter measures current.

The idea being tested is how a voltmeter can cover several voltage ranges using one movement by scaling the input with internal resistors. A multirange voltmeter uses the same meter movement (the same full‑scale current) but switches in different resistors or attenuator networks so that different input voltages produce the same deflection on the meter. On a higher range, more resistance is in series, so a larger voltage is needed to reach full-scale; on a lower range, less resistance allows a smaller voltage to reach full-scale. Each range is calibrated so the pointer reading corresponds to the correct voltage for that range. Other instruments don’t use this single-movement, multi-range approach for voltage: a wattmeter measures power, an oscilloscope measures waveforms with different scales and operating principles, and an ammeter measures current.