[填空题]
Given the circuit shown in Fig. 19–36, use the words “increases,” “decreases nnr6k*ewh*k; ,” zlzt/ yv:p66.z bv)zrolr z/)vz: vypzb6zt6. r “stays the same” to complete the following statements:
(a) If $R_7$ increases, the potential difference between A and E . Assume no resistance in Ann meter and power supply.
(b) If $R_7$ increases, the potential difference between A and E . Assume Ann meter and power supply have resistance.
(c) If $R_7$ increases, the voltage drop across $R_4$ .
(d) If $R_2$ decreases, the current through $R_1$ .
(e) If $R_2$ decreases, the current through $R_6$ .
(f) If $R_2$ decreases, the current through $R_3$ .
(g) If $R_5$ increases, the voltage drop across $R_2$ .
(h) If $R_5$ increases, the voltage drop across $R_4$ .
(i) If $R_2$,$R_5$, and $R_7$ increase, power supply (r = 0) .
参考答案: 空格1: stays in same
空格2: increase
空格3: decrease
空格4: increase
空格5: increase
空格6: decrease
空格7: decrease
空格8: increase
空格9: stays in same
