On a 120 v supply it takes half an amp, because 120 x ½ is 60.
On a 240 v supply it would be a different bulb, designed to work on 240 v, and it would take ¼ amp.
It depends on the voltage and whether the lamps are actually 40 watts or 40 watt equivalent. Watts / volts = amps
To calculate the amperage of a 40-watt bulb, you need to use the formula: Amps = Watts / Volts. If the bulb operates at 120 volts (standard for US households), the amperage will be 0.33 amps (40 watts / 120 volts).
The amps drawn by a 65 watt light bulb should be 65/120 or 0.54167. This fraction of an ampere may be restated as 541.67 milli-amps.
The formula you are looking for is I = W/E. Amps = Watts/Volts.
To calculate the amperage, use the formula: Amps = Watts / Volts. In this case, it would be 580 watts / 120 volts = 4.83 amps. Therefore, you would need approximately 4.83 amps for a 580 watt device at 120 volts.
It depends on the voltage and whether the lamps are actually 40 watts or 40 watt equivalent. Watts / volts = amps
To answer this question the voltage needs to be known.
amps equals watts divided by volts.
It depends on how many Amps (current) are applied to the voltage. Watt = Volts x Amps. e.g. 12 volts @ 5 amps = 60 watts
A 120 volt table lamp with a 75 watt bulb will pull 0.625 amps. With a 100 watt bulb it will pull 0.833 amps. And with a modern fluorescent 13 watt bulb it will pull 0.108 amps.
It will take a current of 46 amps.
A 1450 watt coffee maker will use around 13 amps at 110 volts.
To calculate the amperage of a 40-watt bulb, you need to use the formula: Amps = Watts / Volts. If the bulb operates at 120 volts (standard for US households), the amperage will be 0.33 amps (40 watts / 120 volts).
21.4 amps, 2100 wattsManoj
Multiply the volts by the amps to find the watts.
At 120 volts it will pull 4.166 amps. At 240 volts it will pull 2.08 amps.
It is drawing .06 amps.