The connection of the inner bridge is suitable for ( ).
A: The circuit is short and the transformer needs to be switched frequently
B: The line is long, the transformer does not need to often switch and occasions
C: There are many lines and only two transformers
D: Only two outgoing lines, the number of transformer more occasions
A: The circuit is short and the transformer needs to be switched frequently
B: The line is long, the transformer does not need to often switch and occasions
C: There are many lines and only two transformers
D: Only two outgoing lines, the number of transformer more occasions
举一反三
- At __________________ should exist correct mains voltage. A: the transformer B: connecting transformer C: disconnecting transformer D: pre-disconnecting transformer
- When the secondary side of the electromagnetic current transformer is in normal operation, it is close to ( ) state. A: Overvoltage B: Open C: Short circuit D: Under voltage
- the electric power grid is the connection of () and the transmission lines. A: Transformer B: Generators C: Customer devices
- Two lines can form an infinite number of _______.
- A president can serve ____ terms. A: only one B: no more than two C: more than two D: as many as four