* Watts (W): Measure the power used by a device.
* Amps (A): Measure the amount of electrical current flowing through a device.
* Volts (V): Measure the electrical potential difference, or "push," that drives the current.
The Relationship:
The relationship between watts, amps, and volts is:
* Watts (W) = Amps (A) x Volts (V)
To find amps, you need to rearrange the formula:
* Amps (A) = Watts (W) / Volts (V)
Example:
If you have a 40-watt light bulb and it operates on 12 volts, the current (amps) would be:
* Amps = 40 watts / 12 volts = 3.33 amps
Therefore, you need to know the voltage to calculate the number of amps in 40 watts.