[填空题]
A power supply has a fixed output voltage of 12.0 V, dosyfa gl9:4 6yd/9:h;ctsiy(4xtwq kdj , 4luy9cf /vpk9 i:sfr38gbut you need $V_T\,=\,3.0V$ for an experiment.
(a) Using the voltage divider shown in (Fig. Below), what should $R_2$ be if $R_1$ is $10.0\Omega$? $\approx$ $\Omega$(retain one decimal places)
(b) What will the terminal voltage $V_T$ be if you connect a load to the 3.0-V terminal, assuming the load has a resistance of $7.0\Omega$? $\approx$ V(retain one decimal places)
