标题: An electric heater draws 10 A from a 120V line. The resistance of the heater... [打印本页] 作者: 李老师 时间: 2017-2-24 22:07 标题: An electric heater draws 10 A from a 120V line. The resistance of the heater... An electric heater draws 10 A from a 120V line. The resistance of the heater is _____.
A. 1200Ω
B. 120Ω
C. 12Ω
D. 1.2Ω
满分：2 分
2. In the root-locus method the actual time response of a system can be obtained by means of _____.