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K7-15. Current In RC Circuit
Purpose
To demonstrate charging of a capacitor in a possibly counterintuitive way.
Equipment
7.5 volt battery, 1 farad 5 volt capacitor, knife switch, two 10 volt light bulbs.
Setup Time
5 minutes.
Images
Description
A knife switch is closed to charge a 1 farad (yes, one FARAD), 5 volt capacitor with a 7.5 volt battery. Oh, yes, the capacitor has 10 volt light bulbs on each side of it in the circuit, as shown in the drawing below. Q: What will happen when the switch is closed: (a) both bulbs will light and stay lit, (b) both bulbs will go on momentarily, (c) only one bulb will light and stay lit (if so, which one?), (d) only one bulb will go on momentarily (if so, which one?), (e) neither bulb will go on at all, (f) something else will happen (if so, what?). A: Both bulbs will go on momentarily as the capa
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See pagesk1. forces on moving charges
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See pagesk2. electromagnetic induction
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See pagesk3. transformers
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See pagesk4. motors & generators
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See pagesk5. electrical properties of matter
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See pagesk6. electric circuits & instruments
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See pagesk7. rlc circuits
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See pagesk8. electromagnetic waves
-
See pagesk1. forces on moving charges
-
See pagesk2. electromagnetic induction
-
See pagesk3. transformers
-
See pagesk4. motors & generators
-
See pagesk5. electrical properties of matter
-
See pagesk6. electric circuits & instruments
-
See pagesk7. rlc circuits
-
See pagesk8. electromagnetic waves