若正弦电流i1(t)=I1msin(2πt)A,i2(t)=I2msin(4πt-π/2)A,则i1相位( )
若正弦电流i1(t)=I1msin(2πt)A,i2(t)=I2msin(4πt-π/2)A,则i1相位( )
A、超前i2相位π/2
B、滞后i2相位π/2
C、滞后i2相位π/4
D、不能与i2相位作比较
【正确答案】:D
【题目解析】:频率不同不能比较
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