单项选择题
A.i=5sin(ωt-π/4)A B.i=5√2sin(ωt-π/4)A C.i=10sin(ωt-π/4)A D.i=10sin(ωt-π/2)A
A.80kV B.90kV C.100kV D.105kV
A.40kV B.30kV C.10kV D.6kV