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Technicians Handbook - Historic Naval Ships Association

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Parallel inductors without coupling:Provided the coefficient of coupling between inductors is zero.Resistive/inductive circuit:The time required for the current in an inductor to increase to 63.2 percent of its final value ordecrease to 36.8 percent is known as the time constant.Mathematically expressed:Figure 1-13 shows an L/R time constant chart.Figure 1-13.—L/R time constant.You may want to refer back to figure 1-12, which shows the L/R relationship using the universaltime constant chart.1-24

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