Assuming that the voltage source is an ideal voltage source (zero-ohm internal resistance) and that it provides 28 Vdc, then Ohm’s Law is your answer, as many others mentioned before.
However, if the voltage source provides 28 Vac, Ohms’s Law only applies if the load is purely resistive. For non-resistive loads, all bets are off, as you do not know the frequency or the actual load’s impedance (ZR + ZL + ZC) for said frequency.
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Answer:
Assuming that the voltage source is an ideal voltage source (zero-ohm internal resistance) and that it provides 28 Vdc, then Ohm’s Law is your answer, as many others mentioned before.
However, if the voltage source provides 28 Vac, Ohms’s Law only applies if the load is purely resistive. For non-resistive loads, all bets are off, as you do not know the frequency or the actual load’s impedance (ZR + ZL + ZC) for said frequency.
Explanation:
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