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A circuit consists of a large electromagnet that has an inductance of 55.0 H and a...

A circuit consists of a large electromagnet that has an inductance of 55.0 H and a resistance of 7.90 Ω, a dc 260 V power source, and an open switch - all connected in series.

A. How long after the switch is closed is the current equal to 11.7 A?

B. How long after the switch is closed is the current equal to 31.9 A

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