s10_concept

s10_concept - Inductive Circuits I Concept Test A B V L C...

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Inductive Circuits I Concept Test _ + V L C B A In the circuit above, what happens immediately after the switch is closed? 1. All three bulbs glow evenly initially 2. All three bulbs glow initially, but A is brighter than B and C 3. All three bulbs glow initially, but A is dimmer than B and C 4. Only bulb A glows 5. Only bulbs B and C glow 6. Nothing happens

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Inductive Circuits I Solution 0 5 10 15 20 25 30 35 1 2 3 4 5 6 Number of Students Answer Lecture S10: Inductive Circuits I The correct answer is #1. Immediately before the switch is closed, the current through L is zero. Inductors resist current change, so immediately after the switch is closed, the inductor current is zero it brieﬂy looks like an open circuit. So the current ﬂow through A is the same as through B and C . The class did pretty well on this one, with a majority answering correctly.
Circuits II Concept Test _ + V L C B A In the circuit above, what happens to each bulb over time after the switch is closed? 1.

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This note was uploaded on 01/28/2012 for the course AERO 16.01 taught by Professor Markdrela during the Fall '05 term at MIT.

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s10_concept - Inductive Circuits I Concept Test A B V L C...

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