A resistor, an inductor, and a switch are all connected in series to an ideal ba

Question

A resistor, an inductor, and a switch are all connected in series to an ideal battery of constant terminal voltage. What does the time constant for the circuit represent?

The time constant represents the time required for the current to reach 63% of the maximum current. The time constant represents the time required for the current to reach 25% of the maximum current. The time constant represents the time required for the current to reach 37% of the maximum current. The time constant represents the time required for the current to reach 50% of the maximum current. The time constant represents the time required for the current to reach 99% of the maximum current. The time constant represents the time required for the current to reach 75% of the maximum current.

Explanation / Answer

The time constant represents the time required for the current to reach 63% of the maximum current.

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