'Speed' is only one of the factors that determine the output voltage of an a.c. generator, so your question cannot be answered. In practise, speed is more important establishing frequency rather than voltage.
If it is AC then you don't need a formula, you just need a transformer.
I found this light http://www.ecolivingcentre.com.au/products-page/?product_id=23 and it is the perfect size and power for a torch we are making in graphics, the only problem is that it runs on 240 volt ac current and the torch im going to make is going to have a 12 volt dc lead acid battery, is there any way that you can make the battery work with this light
An ac generator produces ac, a dc generator produces dc, it all depends on the generator.
Alternator and ac generator is equal
A: the rms value will be169 volts add a capacitor and no load 240 volts and the average will be 153 volts
no
240 amps AC
Start the generator and check the voltage output at the receptacles on the generator with an AC volt meter.
The relationship between RPM and AC voltage depends on the specific generator design and construction. In general, higher RPMs are typically required to generate higher AC voltages, but the exact RPM needed to produce 220 volts can vary widely depending on the specific generator's specifications. It is best to consult the manufacturer's recommendations or the generator's technical specifications for accurate information.
The formula for RPM is, RPM = Hz x 60 x 2/# of poles the motor has. To answer this question more information needs to be stated.
It shouldn't damage the equipment. But it will probably not work properly.
If it is AC then you don't need a formula, you just need a transformer.
You wouldn't. Terminology wrong? An alternator is a generator that generates AC.
There are several ways to convert a 240 volt input to a 1.5 volt output. If the 240 volt input is alternating current (AC), a simple transformer can reduce the 240 volts to 1.5 volts (AC). A properly configured resistor or impedance coil in series with the input and output would also do the job but a tansformer also serves to isolate the output from the input offering greater protection for the 1.5 volt device. You If 1.5 volts direct current (DC) is required, a rectifier circuit is needed after the 1.5 volt AC output. If the source is 240 volts (DC), A resistance circuit in series can reduce the output voltage. You can also use electronic circuitry to chop of the 1.5 volts.
I found this light http://www.ecolivingcentre.com.au/products-page/?product_id=23 and it is the perfect size and power for a torch we are making in graphics, the only problem is that it runs on 240 volt ac current and the torch im going to make is going to have a 12 volt dc lead acid battery, is there any way that you can make the battery work with this light
what is the construction of ac generator
Not unless you have a 110 volt supply to plug it in to. The standard General Power Outlet in Australia is 240 volts AC at 50 Hertz.