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Volts * Amps = Watts 12V * A = 150W A = 150W/12V A = 12.5
The formula you are looking for is I = W/E. Amps = Watts divided by Volts.
4.16 Amps
As watts equals volts times amps (ohms law simplified) you are missing part of the equation.. Let's say you are asking about how many watts is 1 amps at 12v then... If W = V x A then 1A at 12v = 12 watts
Input: 110-240V AC, Output: 12V DC, 3.7A
Volts * Amps = Watts 12V * A = 150W A = 150W/12V A = 12.5
The power dissipated by a circuit with a voltage of 12V and a current of 3A is 36W. Watts is Volts times Amps.
The formula you are looking for is I = E/R. Amps = Volts/Resistance. If you say it is normally a 2 Amp circuit, it normally draws 2 amps. Therefore the original resistance offered to the 12v battery is 2/12 = 6 Ohms. If you then connect a 12 Ohm resistor in series, they are added, so R = 18 Ohms. Now if you put 12v across this circuit it will draw 12/18 = 0.66 Amps. Or If you just put a 12 Ohm resistor across the 12v supply it will draw 1 Amp. If the circuit is protected by a 2 Amp fuse, it will not blow, but the resistor will get hot.
160 amps at 12v.
160 amps at 12v.
Just connect the circuit. It will only draw the amps it needs to operate. It is just like connecting a 100 watt light bulb that draws way less than 1 amp, to a 20 amp household circuit.
The formula you are looking for is I = W/E. Amps = Watts divided by Volts.
well the equation for amps is a= watts/volts so 25/12= 2.0833333333amps
The easiest way is to connect a 12v battery to the circuit. Be sure to place a diode in the positive line (watch polarity) to keep the battery from loading down the power supply when charging.
4.16 Amps
12V 5A = 12V 5000mA
About 0.6 amps for a 12v 21w bulb