Capacitors are fundamental electric-circuit components, but there's more to using them properly than you might think.
The capacitor, the simple passive component that you learn about in circuits 101. In DC circuits, capacitors just sit there and store energy until it's needed. In AC circuits, capacitors let AC signals pass while blocking DC. They're used extensively in filters and they provide needed energy in high-speed digital circuits, especially during signal switching.
Capacitors come in many varieties. Using one with the right construction can make your circuit work while using the wrong type can result in failure. That is, the circuit may not function as intended or it can fail catastrophically in the field, both of which are undesirable.
The idea for this week's quiz came when I learned about a new book, ABC of Capacitors from Wurth Electronik, which recently expanded its line of capacitors. The company has made excerpts from the book available, which was the source for this week's quiz. Cost for the entire book is $12 US or 9.9€. As always, answers appear on the last page.
1. Which describes the strength of an electric field in a capacitor?
- electric field density
- Change in voltage with respect to time
- Change in current with respect to time
- displacement flux density
- a and b only
- b and c only
- a and d only
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