Presumably the governor is on the prime mover rather than the alternator?

What phenomenon is responsible for it becoming harder to turn?

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On 22 Feb 2011, at 09:34, Kerry Wentworth <kwentworth@skunkworksnh.com> wro=
te:

> Absolutely!  You can test this for yourself if you have a DC or stepper=20
> motor.  Turn the shaft, then short the windings and try again.  A=20
> generator would normally have a governor to keep the output frequency at=
=20
> 50 or 60 Hz.  That would automatically compensate for increased load.
>=20
> Kerry
>=20
>=20
> Andrew Wood wrote:
>> Thanks for the replies so far.
>>=20
>> Is it true that a generator becomes physically harder to turn the higher=
 the current load?
>>=20
>> Presumably in that case a petrol diesel generator must have some way of =
automatically detecting this and increasing the power to the engine?
>>=20
>>=20
>=20
>=20
>=20
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