A 45- $\mathrm { mH }$ Inductor Is Connected in Series with A

question 171

Multiple Choice

A 45- $\mathrm { mH }$ inductor is connected in series with a $60 - \Omega$ resistor through an ideal $15 - \mathrm { V }$ dc power supply and an open switch. What is the current $7.0 \mathrm {~ms}$ after closing the switch?

• A) \(550 \mathrm {~mA}\)
• B) \(850 \mathrm {~mA}\)
• C) \(280 \mathrm {~mA}\)
• D) \(650 \mathrm {~mA}\)
• E) \(250 \mathrm {~mA}\)

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