Between terminals

Between terminals of a 220V resistor. A current of 220mA flows through the resistor. Determine the current that flows through the resistor if we connect it to the terminal of a 24 V voltage source.

Correct answer:

I₂ =  0.024 A

Step-by-step explanation:

$$\begin{gathered} U_1=220\text{V} \\ {I}_1=220\text{mA}\to \text{A}=220:1000\text{A}=0.22\text{A} \\ {U}_2=24\text{V} \\ U=RI \\ R=\frac{U_1}{I_1}=\frac{220}{0.22}=1000\Omega \\ {I}_2=\frac{U_2}{R}=\frac{24}{1000}=0.024\text{A} \end{gathered}$$

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