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Figure P 18.26 shows a voltage divider, a circuit used to obtain a desired voltage $\Delta V_{\text { out }}$ from a source voltage $\mathcal{E}$ . Determine the required value of $R_{2}$ if $\boldsymbol{E}$ $=5.00 \mathrm{V}, \quad \Delta V_{\mathrm{out}}=1.50 \mathrm{V},$ and $R_{1}=1.00 \times 10^{3} \Omega .$ (Hint: Use Kirchhoff's loop rule, substituting $\Delta V_{\mathrm{out}}=I R_{2},$ to find the

current. Then solve Ohm's law for $R_{2} .)$

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