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Voltage across a resistance = (resistance) x (current through the resistance) =

4 x 1.4 = 5.6

If the ' 1.4 ' is Amperes of current, then the required voltage is 5.6 volts.

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Q: If a circuit has a resistance of 4 ohm's how much voltage is needed to produce a 1.4 current in the circuit?
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