how much electrical energy is converted to light and thermal energy by a 140 w light bulb in one day?

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15-12-2022
Physics

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how much electrical energy is converted to light and thermal energy by a 140 w light bulb in one day?

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tutorconsortium631 tutorconsortium631 · Answer 1 · 2022-12-21T02:50:32-05:00

Energy=1.209×10^7 J is the electrical energy is converted to light and thermal energy by a 140 w light bulb in one day.

How to solve?

We need to find how much electrical energy is converted to light and thermal energy by a P=140 W light bulb in one day, t=24.0 h. that is,

Energy=Pt

substitute with the given to get,

Energy=(140 W)(24.0 h)(3600 s/h)=1.209×10 ^7 J

Energy=1.209×10^7 J

Where is the energy of the inductor kept?

The magnetic field produced by the current passing through the inductor is where this energy is kept. The energy is held without being lost in a pure inductor, where it is released back into the circuit when the inductor's magnetic field falls and the current through it is scaled down.

What is the secret to having the most energy?

The energy of a photon at frequency f is equal to the maximal energy of an emitted electron, or E = hf, less the energy necessary to eject an electron from the metal's surface (the so-called work function).

Learn more about energy here:

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