LR Circuits: A resistor and an inductor are connected in series to a battery. The battery is suddenly removed from the circuit and replaced by a wire to complete the circuit. The time constant for of the new circuit represents the time required for the current to decrease to
A. 25% of the original value.
B. 37% of the original value.
C. 63% of the original value.
D. 75% of the original value.
E. zero.
Answer: B
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