Is voltage an intensive property?

The wattage marked on a lightbulb is not an inherent property of the bulb but depends on the voltage to which?

  • The wattage marked on a lightbulb is not an inherent property of the bulb but depends on the voltage to which it is connected, usually 110 or 120 V. How many amperes flow through a 45 W bulb connected in a 120 V circuit?

  • Answer:

    Watts = Volts * Amps 45W/120V = .375A

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