【简答题】如图3—27所示的三相交流电路中,两个对称的星形联结三相负载并联,已知电源相电压为220 V, 。求:(1)各电流表的读数;(2)电源提供的有功功率。
【单选题】16) Which of the following is true about Herzberg's two-factor theory?
A.
Herzberg believed that the factors that led to job satisfaction were the same as those that led to job dissatisfaction.
B.
To motivate people, Herzberg suggested emphasizing the hygiene factors of a job.
C.
Herzberg's theory has influenced how we currently design jobs.
D.
According to Herzberg, removing dissatisfying characteristics from a job will invariably make that job more satisfying and motivating.
【单选题】下列行为中国家应负赔偿责任的是______。
【单选题】如图所示三相电路,已知三相电源对称,三个线电流有效值均相等即 I A = I B = I C =10A ,则中性线电流有效值 I N 等于( )。
【单选题】Frederick Herzberg's two-factor theory proposes that ________.
A.
intrinsic factors cause job dissatisfaction
B.
extrinsic factors have the maximum effect on job satisfaction
C.
extrinsic factors are associated with job dissatisfaction
D.
intrinsic factors have little effect on job satisfaction
【单选题】如图所示三相电路,已知三相电源对称,三个线电流有效值均为10A,则中性线电流 等于( )A。
【单选题】Frederick Herzberg's two-factor theory proposes that ________.
A.
intrinsic factors cause job dissatisfaction
B.
extrinsic factors have the maximum effect on job satisfaction
C.
extrinsic factors are associated with job dissatisfaction
D.
intrinsic factors have little effect on job satisfaction
【简答题】(华南理工大学20l0年考研试题)电路如图12—35所示,A、B、C端接三相对称电压源,已知线电压UAB=380V,阻抗Z=50+j50Ω,Z1=100+j100Ω,试求:(1)开关S打开时各线电流IA、IB和IC;(2)开关S闭合时各线电流IA、IB和IC;(3)开关S闭合时两个功率表的读数P1和P2。