1.

What is the formula for brush contact loss of DC machines?

A. brush contact loss = armature current + brush contact voltage
B. brush contact loss = armature current – brush contact voltage
C. brush contact loss = armature current * brush contact voltage
D. brush contact loss = (armature current + brush contact voltage) / 2
Answer» D. brush contact loss = (armature current + brush contact voltage) / 2


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