The speed of an AC generator due to loading depends on two factors:-

1) The size of the generator in terms of KW output.

2) The size of the load being connected to the generator also in terms of KW or W.

In general, a generator ranges from as small as a few KWs to as large as MW. The light bulb will generally be 100W to may be maximum of 1000W(1KW) if it is an incandescent bulb.In such a situation,connecting a single light bulb to the AC generator will not have any impact on its speed.

I found an answer from www.britannica.com

Electricity - Conductors, insulators, and semiconductors | Britannica ...

In a typical atom with many electrons, the lower energy levels are filled, each with the ... The “holes” left behind in the valence band are mobile charge carriers but ... coils of an electric range or in the hot tungsten filament of an electric light bulb. ... of electromotive force, the Van de Graaff generator will be discussed first.

For more information, see Electricity - Conductors, insulators, and semiconductors | Britannica ...

I found an answer from www.nationalgeographic.com

Energy Sources, Renewable Energy, Oil, Coal - National Geographic

Jun 22, 2019 ... Much of the world's electricity is produced in coal-fired generators that belch carbon dioxide ... I live on an island that happens to have no utilities, but otherwise my .... We believe solar electric systems will be disruptive to the energy industry .... this setup could reduce a home's annual power bill to near zero.

For more information, see Energy Sources, Renewable Energy, Oil, Coal - National Geographic

I found an answer from www.bbc.com

Energy transfer

It cannot be created or destroyed but it can be transferred, dissipated or ... We'll remember what you've looked at so you can jump back in. ... radiation - energy tranferred as a wave, eg light and infrared - light radiation and ... top of the slide is transferred as mechanical work done to speed up and to do work against friction.

For more information, see Energy transfer

I found an answer from www.quora.com

How to stop the lights from flickering on generator power - Quora

There are many types of generators, so it is hard to generalize. ... When the engine speed reduces, any connected lights will dim. ... These unfortunately tend to be expensive, but they will produce rock-solid stable output ... Light bulbs should never flicker if powered by clean AC power with a good sine wave ...

For more information, see How to stop the lights from flickering on generator power - Quora

I found an answer from physics.stackexchange.com

electricity - Why do bulbs glow brighter when connected in parallel ...

The bulbs will only appear brighter if the available current to the system is not limited. ... and the parallel circuit will appear brighter (but will drain your battery faster). ... we wire light bulbs in parallel instead of in series, we decrease the ... too large for the generator, lowering the voltage over the shunt too far, ...

For more information, see electricity - Why do bulbs glow brighter when connected in parallel ...

I found an answer from engineering.stackexchange.com

Do generators run slower if the load is lower? - Engineering Stack ...

At a lower load they run at the same speed but the generator becomes ... If you are talking about gas electric generators designed to supply household ac power , there ... Note this has as much to do with making them quiet as saving fuel. ... For example if the engine is running with nothing connected to the ...

For more information, see Do generators run slower if the load is lower? - Engineering Stack ...

I found an answer from electronics.stackexchange.com

What happens if a 240V appliance is connected in a 120V AC power ...

Consider an appliance only intended for operation on 240V AC but is ... The point is that it will try and draw more current at a lower AC voltage and this could blow an .... So far, the motor has no problem getting to speed and doesn't seem to get ... NO IF WE CONNECT ANY APPLIANCES BELOW IT RATED ...

For more information, see What happens if a 240V appliance is connected in a 120V AC power ...

I found an answer from en.wikipedia.org

Synchronization (alternating current) - Wikipedia

In an alternating current electric power system, synchronization is the process of matching the speed and frequency of a generator or other source to a running network. An AC generator cannot deliver power to an electrical grid unless it is ... However, an AC generator must match both the amplitude and the timing of the ...

For more information, see Synchronization (alternating current) - Wikipedia

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Hydroelectric Power

hydroelectric plants supplied as much as 40 percent of the electric energy ... located on rivers, streams, and canals, but for a reliable water supply, dams are ... head and the discharge at the power site and the desired rotational speed of the generator ... To find how much electrical power we can expect, we must convert the ...

For more information, see Hydroelectric Power