设r<sub>1</sub>、r<sub>2</sub>和L<sub>1</sub>、L<sub>2</sub>分别是变压器一、二次绕组的电阻和自感,M是其互感,则理想变压器的条件是()。
A、r1=r2=0,L1=L2=M=0
B、r1=r2=0,L1=L2=M=∞
C、r1=r2=∞,L1=L2=M=0
D、r1=r2=∞,L1=L2=M=∞
A、r1=r2=0,L1=L2=M=0
B、r1=r2=0,L1=L2=M=∞
C、r1=r2=∞,L1=L2=M=0
D、r1=r2=∞,L1=L2=M=∞
A、(R<sub>1sub>+R<sub>2sub>)/R<sub>1sub>R<sub>2sub> B、R<sub>1sub>R<sub>2sub>/(R<sub>1sub>+R<sub>2sub>) C、R<sub>1sub>+R<sub>2sub> D、R<sub>1sub>R<sub>2sub>
A、R<sub>1sub>与R<sub>3sub>串联后与R<sub>2sub>并联 B、R<sub>1sub>与R<sub>3sub>并联后与R<sub>2sub>串联 C、R<sub>1sub>与R<sub>2sub>并联后与R<sub>3sub>串联 D、R<sub>1sub>与R<sub>2sub>串联后与R<sub>3sub>并联
A、R<sub>1sub>>R<sub>2sub>>R<sub>3sub> B、R<sub>1sub><R<sub>2sub><R<sub>3sub> C、R<sub>1sub>>R<sub>3sub>>R<sub>2sub> D、R<sub>3sub>>R<sub>1sub>>R<sub>2sub>
A、R<sub>Asub>:R<sub>Bsub>=2,T<sub>Asub>:T<sub>Bsub>=2 B、R<sub>Asub>:R<sub>Bsub>=1/2,T<sub>Asub>:T<sub>Bsub>=1 C、R<sub>Asub>:R<sub>Bsub>=1,T<sub>Asub>:T<sub>Bsub>=1/2 D、R<sub>Asub>:R<sub>Bsub>=2,T<sub>Asub>:T<sub>Bsub>=1
A、R<sub>1sub>>R<sub>2sub>>R<sub>3sub> B、R<sub>1sub><R<sub>2sub><R<sub>3sub> C、R<sub>1sub>>R<sub>3sub>>R<sub>2sub> D、R<sub>2sub>>R<sub>1sub>>R<sub>3sub>
A、R<sub>1sub>烧坏,R<sub>2sub>不会烧坏 B、R<sub>1sub>、R<sub>2sub>均烧坏 C、R<sub>1sub>未烧坏,R<sub>2sub>烧坏 D、R<sub>1sub>、R<sub>2sub>均未烧坏
A、R<sub>1sub>>R<sub>0sub> B、R<sub>1sub><R<sub>0sub> C、R<sub>1sub>=2R<sub>0sub> D、R<sub>1sub>=R<sub>0sub>
A、顺磁质μ<sub>rsub>>0,抗磁质μ<sub>rsub><0,铁磁质μ<sub>rsub>>>1 B、顺磁质μ<sub>rsub>>1,抗磁质μ<sub>rsub>=1,铁磁质μ<sub>rsub>>>1 C、顺磁质μ<sub>rsub>>1,抗磁质μ<sub>rsub><1,铁磁质μ<sub>rsub>>>1 D、顺磁质μ<sub>rsub><0,抗磁质μ<sub>rsub><1,铁磁质μ<sub>rsub>>0
A、R<sub>1sub>〉R<sub>3sub>〉R<sub>2sub> B、R<sub>1sub>=R<sub>2sub>=R<sub>2sub> C、R<sub>1sub>〈R<sub>3sub>〈R<sub>2sub> D、都不对