DC Generators
As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately

25 percent
40 percent
5 percent
10 percent

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DC Generators
In a D.C. generator

Internal characteristic = magnetization characteristic ohmic drop
Magnetization characteristic = external characteristic
External characteristic = magnetization characteristic ohmic drop armature reaction
External resistance = internal characteristic armature reaction

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