Our power consumption is measured by which device?

Our power consumption is measured by which device?

• A. Watt-Hour Meter
• B. Multimeter
• C. Ammeter
• D. Watt-Hour Meter

Answer: (D)

Power consumption over time is energy, the amount of work used, so you need a device that accumulates this energy as it flows. A watt-hour meter does exactly that: it records how many watt-hours (or kilowatt-hours) have been used, providing the total energy consumed over a period. A multimeter measures instantaneous electrical values like voltage or current, not the total energy used over time. An ammeter measures current, again not energy accumulation. So the watt-hour meter is the appropriate instrument for measuring power consumption over time.

Power consumption over time is energy, the amount of work used, so you need a device that accumulates this energy as it flows. A watt-hour meter does exactly that: it records how many watt-hours (or kilowatt-hours) have been used, providing the total energy consumed over a period. A multimeter measures instantaneous electrical values like voltage or current, not the total energy used over time. An ammeter measures current, again not energy accumulation. So the watt-hour meter is the appropriate instrument for measuring power consumption over time.