Question #9aff0

1 Answer
Eddie
Apr 30, 2017

The bulb has a fixed resistance. Domestic residences have a take nationally set voltage off the grid, usually 230 - 240 V depending where you are. So the current as well as the voltage the bulb is expected to draw is pre-set. And therefore power #P = VI# can be calculated beforehand.

So the bulb will burn 75 J/s when drawing on the anticipated voltage.

That's none of the above.

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