电工基础知识(答案).

1.(C)ABCD2.(D)ABCD3.AABCD4.(D)ABCD5.AABCD6.(D)ABCD7.(D)ABCD8.(D)ABCD9.(D)ABCD10.(A)ARBCDR11.BA.BCD12.CABCD13.BABCD14.BABCD15.AABCD16.BABCD17.AABCD18.AABCD19.AABCD20.(B)A30B90C180D36021.104JJCA2%B10%C5%D15%22.(D)ABCD23.(D)ABCD24.(B)ABCD25.(B)ACJBCDCCADCN26.(B)ABCD27.DABCD28.(D)ABCD29.CASNBNSCSNNSDNSSN30.(B)SNABCD31.(A)NSABCD32.(B)ABCD33.(C)ABCD34.(A)ABCD35.BABCD36.(D)ABCD37.(C)ABCD38.(C)ABCD39.DABCD40.BABCD41.DABCD42.CABCD43.BABCD44.220VAA100WB25WCD45.AABCD46.(A)ABCD47.(A)ABCD48.(B)ABCD49.(A)ABCD50.2u2A0.2uFB2.2uFC22uFD0.22uF51.BAWbBACA/mDAm52.BHAH=uBBB=uHCH=u0BDB=u0H53.AABCD54.B-HBABCD55.HDABCD56.CABCD57.(D)ABCD58.DA2/*avmEEB2/*avmUEC2/*avmIED/1.44mII59.380VBAu=380sin314tBu=537sin(314t+45o)Cu=380sin(314t+90o)Du=380sin(314t+45o)60.i1=10sin(314t+90o)i2=10sin(628t+30o)DAi1i260oBi2i130oCi1i2-60oD61.AABCD62.RLUR=16VUL=12VBA28VB20VC2VD4V63.8.665BA0.5B0.866C1D0.664.(C)A45B90C120D18065.1(A)A0VB0.2VC1.96VD2V66.2(A)A0AB10AC0.2AD0.2A67.3(C)A0AB10AC0.2AD0.2A68.AABCD69.CABCD70.V-U-W-V(B)ABCD71.AA30B60C30D6072.220V380VBAYBYCDAB73.(B)ABCD74.AABCD75.AABCD76.BABCD77.AABCD78.AABCD79.CABCD80.CABCD81.BABCD82.CABCD83.CABCD84.(C)ABCD85.(B)ABCD86.(B)ABCD87.BABCD88.DA.QSB.SQC.SAD.KM89.BA.QSB.SQC.SAD.KM90.AABCD91.CABCD92.CABCD93.DABCD94.,(B).ABCD95.,(C)ABCD96.BABCD97.(A)ABCD1.2.3..4.5.6.1F106F1012pF7.8.9..10.9011.12.13.U=E+I14.UE-Ir15.10V100V500V16.17.18.19.20.21.22.,23.