These do not convert. ma (milliamps) is a unit of electric current, while volts is a unit of voltage. They are related by Ohm's Law: V = I*R, with V is voltage (volts), I is current (amps), and R is resistance (Ohms).
In WYE 480 VAC each leg to neutral is equal to 277 volts. 480 / 1.73 (sq root of 3) = 277.
A half of an amp equals 500 mA.ma or mA means milliAmp or milliAmpere. As milliAmpere and Ampere are related as: 1mA = 1*10^-3 A = 0.001 A, so you can express 500 ma as 500*0.001 A = 0.5 A. See relarted linksbelow.
This depends on the voltage ... amps = watts / volts 660 W / 110 V = 6 amps 660 W / 220 V = 3 amps 660 W / 330 KV = 2 mA
ma stands for milliamp. The prefix 'milli is equivalent to .001 So 1 amp would be 1000 milliamps and 20 milliamps would be .02 amps
3 batteries likely refer to 3 individual batteries. Each battery typically provides a voltage around 1.5 volts. So, in total, 3 batteries would provide approximately 4.5 volts.
3 Kv = 3,000 volts.
Depends on the led forward bias threashold, if its a typical led it will be .7 volts so, .7x6=4.2V, so pick a resistor that will drop around 7 volts. What is the current? Then just to V=IR, 7=IR.
In WYE 480 VAC each leg to neutral is equal to 277 volts. 480 / 1.73 (sq root of 3) = 277.
No, if you use a 6 volts adapter instead of a 9 volts adapter, you will be supplying 3 volts too little to the item that requires 9 volts. Either it may not work properly or it won't work at all. The fact that the 6 volt adapter can supply more current (2000 mA instead of only 1200 mA) won't help solve the problem of having insufficient voltage.
difference is 2.7 amperes in numbers will be 12 volts 3 amps and the other will be 12 volts .3 amps
It will take 36 volts to make 12 amps go through 3 ohms of resistance. Ohm's law states that the current in amperes is equal to voltage over resistance.
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A half of an amp equals 500 mA.ma or mA means milliAmp or milliAmpere. As milliAmpere and Ampere are related as: 1mA = 1*10^-3 A = 0.001 A, so you can express 500 ma as 500*0.001 A = 0.5 A. See relarted linksbelow.