A current

A current of 0.1 A flows in the branch with a resistance of 5 ohms. In the second branch, a current of 0.2 A. Calculate: a) what is the resistance of the second branch, b) to what voltage was the circuit connected?

Correct answer:

R₂ =  2.5 Ω
U =  0.5 V

Step-by-step explanation:

$$\begin{gathered} R_1=5\Omega \\ {I}_1=0.1\text{A} \\ {I}_2=0.2\text{A} \\ U=R_1\cdot I_1=5\cdot 0.1=\frac{1}{2}=0.5\text{V} \\ U=R_2\cdot I_2 \\ {R}_2=U/I_2=0.5/0.2=2.5\Omega \end{gathered}$$

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