在RC串联电路中,已知外加电压:u(t)=20+90sin(ωt)+30sin(3ωt+50°)+10sin(5ωt+10°)V,电路中电流:i(t)=1.5+1.3sin(ωt+85.3°)+6sin(3ωt+45°)+2.5sin(5ωt-60.8°) A,则电路的平均功率P为()
A.124. 12W B.128. 12W C.145. 28W D.134. 28W正确答案B
在RC串联电路中,已知外加电压:u(t)=20+90sin(ωt)+30sin(3ωt+50°)+10sin(5ωt+10°)V,电路中电流:i(t)=1.5+1.3sin(ωt+85.3°)+6sin(3ωt+45°)+2.5sin(5ωt-60.8°) A,则电路的平均功率P为()
A.124. 12W B.128. 12W C.145. 28W D.134. 28W正确答案B