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Use a 2.25 ohm 25watt ballast resistor;Renault used them to drop the voltage for the Engine control computers.

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15y ago

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How much resistance required to convert 12V DC to 10.5V DC?

How much current? Volts/Amps = Ohms. In your case Volts = 1.5


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DC 12V power supply can convert 110/220V AC power source to 12V DC.


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The size of the rheostat needed for a 12V battery depends on the specific application and the required current. To determine the appropriate rheostat, you need to calculate the desired resistance using Ohm's Law (V = IR), where V is the voltage (12V) and I is the current in amperes. Additionally, consider the power rating of the rheostat, which should be sufficient to handle the power dissipated (P = IV). For example, if you need a current of 1A, a rheostat with a resistance of 12 ohms and a power rating of at least 12 watts would be suitable.


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To convert 110v to 12v using a transformer, you would need a transformer with a turns ratio of 9.17:1. This means the primary winding (110v) would have 9.17 times more turns than the secondary winding (12v), allowing for the voltage conversion. Make sure to select a transformer with the appropriate power rating to handle the load at 12v.


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Electromagnet current of o5 a supply is 12v what resistance does the electromagnet have?

Using Ohm's Law (V = I * R), where V is voltage, I is current, and R is resistance, we can rearrange the formula to solve for resistance: R = V / I. In this case, R = 12V / 0.5A = 24 ohms. So the resistance of the electromagnet is 24 ohms.