看不到图,只能按常规跟你解了.当线圈转过1/4周期时电动势最大.则:
(1)I=ε/R总=nBLV/(R线圈+R外)=n B ab 100×2π bc / (R线圈+R外)=50×0.5×0.2×100×2×3.14×0.1/(10+40)=6.28A 最后除以√2变成有效值就是电流表的计数:6.28/√2=4.44A
(2)电压表计数是外电压:U=IR外=4.44×40=177.6V
(3)q=I t=I×(1/4)T=4.44×(1/4)×1/100=0.011库
(4)Q=I^2Rt=4.44×4.44×40×(1/4)×1/100=1.97J