Forum Discussion
Hiker_01
Oct 19, 2016Explorer
Voltage = Current x Resistance
Wattage = Voltage x Current
Combine the above
Wattage = Voltage (Current x Resistance) x Current
or
Wattage = Current x Current x Resistance
If you know Wattage and Resistance and want to find Current
Current = square root of (Wattage / Resistance)
Current = Square root of (40/32) = ~1.12 amps drawn
Current = Square root of (60/17) = ~1.85 amps drawn
So, it makes sense that a 60 watt bulb draws more amps. Looks like your measurements make sense.
Don
Wattage = Voltage x Current
Combine the above
Wattage = Voltage (Current x Resistance) x Current
or
Wattage = Current x Current x Resistance
If you know Wattage and Resistance and want to find Current
Current = square root of (Wattage / Resistance)
Current = Square root of (40/32) = ~1.12 amps drawn
Current = Square root of (60/17) = ~1.85 amps drawn
So, it makes sense that a 60 watt bulb draws more amps. Looks like your measurements make sense.
Don
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