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ASVAB · General

What unit measures electrical power?

Correct answer

Watt

  1. A Ohm
  2. B Watt
  3. C Volt
  4. D Farad

Why this is the answer

The WATT measures electrical POWER (the rate of energy use/transfer). ASVAB Electronics Information tests units. POWER FORMULA: P = V × I (Power = Voltage × Current), measured in watts. Other units: VOLT (voltage), AMPERE (current), OHM (resistance), FARAD (capacitance), WATT (power). EXAMPLE: a device drawing 2 amps at 120 volts uses 240 watts. A kilowatt = 1,000 watts; electricity bills use kilowatt-hours (energy). Knowing the watt measures power (and P = V × I) is commonly tested.
Source: ASVAB Electronics Information — Power (Watts)

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