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    14.素養(4)
1 有耦合的兩線圈,線圈1與線圈2之匝數分別是100匝及200匝,線圈1加入5安培電流產生5毫韋伯磁通,其中有4毫韋伯磁通與線圈2交鏈,請問此兩線圈的耦合係數及線圈2的自感量分別為何? 102 統測
A 0.4,0.8H
B 0.8,0.4H
C 0.6,0.5H
D 0.5,0.6H

耦合係數K = Φ12Φ1 = 4m5m = 0.8

L1 = N1 Φ1I1 = 100 5m5 =0.1H

M = N2 Φ12I1 = 200 4m5 = 0.16H

M = K L1L2

0.16 = 0.80.1L2

L2=0.4H