[Electric engineering.] . 56 ELECTRIC TRANSMISSION. 15 case, the voltage of the dynamo would drop and the charg-ing current fall to zero. If the circuit were not opened, acurrent would flow from the battery through the dynamoand run it as a motor. Another instance in which damagemight result if an underload switch were not used is in casethe field circuit of the dynamo should happen to become. ! j l x X~ J_L_J

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