[填空题]
A zener diode voltag eeyeae(zuv; *g9z )a7e regulator :d f; 64.ygrcayuynu3is shown in (Fig. Below). Suppose that $ R = 1.80\ \text{k}\Omega $ and that the diode breaks down at a reverse voltage of 130 V. (The current increases rapidly at this point, as shown on the far left of Fig. 29-28 at a voltage of $ -12\ \text{V} $ on that diagram.) The diode is rated at a maximum current of 120 mA.
(a) If $ R_{\text{load}} = 15.0\ \text{k}\Omega $, over what range of supply voltages will the circuit maintain the output voltage at 130 V? $\ \text{V} \leq V \leq $ $\ \text{V}$
(b) If the supply voltage is 200 V, over what range of load resistance will the voltage be regulated? $\ \text{k}\Omega \leq R_{\text{load}} < \infty$
