Two resistors 5

Two resistors are connected in parallel. The first resistor has a resistance of 2000 ohms and a current of 4 mA flows through it. The second resistor has a resistance of 1600 ohms.

1/Draw a circuit diagram
2/Determine the voltage of the power source.
3/What current flows through the second resistor
4/What current flows through the unbranched part of the circuit
5/Determine the resulting resistance of both resistors

Correct answer:

U =  8 V
I₂ =  0.005 A
I =  0.009 A
R =  888.8889 Ω

Step-by-step explanation:

$$\begin{gathered} R_1=2000\Omega \\ {I}_1=4\text{mA}\to \text{A}=4:1000\text{A}=0.004\text{A} \\ {R}_2=1600\Omega \\ U=R_1\cdot I_1=2000\cdot 0.004=8\text{V} \end{gathered}$$

$I_2=\frac{U}{R_2}=\frac{8}{1600}=0.005\text{A}$

$I=I_1+I_2=0.004+0.005=0.009\text{A}$

$R=\frac{U}{I}=\frac{8}{0.009}=888.8889\Omega$

Try another example