Question

A bulb is rated as 40 w , 220 v what does that mean ?

Answer 1

it is the SI unit of power, equivalent to one joule per second, corresponding to the rate of consumption of energy in an electric circuit where the potential difference is one volt and the current one ampere.

Voltage, electric potential difference, electric pressure or electric tension is the difference in electric potential between two points.

while 220 v mean this bulb will perform its best on that voltage

40 watt which is related to energy consumption or in other words we can say how much it will cost to you about energy

hopefully it helped you

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