(1)计算静态值IB,IC,UCE;
(2)试说明其稳定静态工作点的物理过程。
A.1l
B.15
C.18
D.20
力矩电动机在长期堵转运行时电枢电流是否可以大于Ib和Ip;在短时堵转运行时,电枢电流是否可以大于Ib和Ip?
已知电路如图所示,u=50+300sin(ωt+30°)V,,ib=8. 93sin(tot一10。)A,试求:
By experiment, it is found that 9.33×10-5mol of calcium carbonate, CaCO3, dissolves in 1L of aqueous solution at 25℃. What is the solubility product constant at this temperature?