When a switch is closed, completing an LR series circuit, the time needed for the current to reach three-quarters its maximum value is ____ time constants.
A)0.500
B)0.693
C)0.725
D)1.33
E)1.39
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When a switch is closed, completing an LR series circuit, the time needed for the current to reach three-quarters its maximum value is ____ time constants.
A)0.500
B)0.693
C)0.725
D)1.33
E)1.39