Electronics quiz
Capacitors quiz
Charge storage, series vs. parallel, and why they show up next to every IC.
20 questions in the app. A few of them, with their answers:
What is capacitance measured in?
- Ohms
- Henries
- Farads ✓
- Amperes
Answer Capacitance is measured in farads (F), usually seen in practice as µF, nF or pF.
What does a capacitor fundamentally do?
- Amplifies a signal
- Stores energy as an electric field between two plates ✓
- Converts AC to DC by itself
- Blocks all electrical current permanently
Answer A capacitor is two conductive plates separated by an insulator, storing charge as an electric field.
Once a capacitor is fully charged in a DC circuit, what current flows through it?
- Maximum current
- Essentially zero current ✓
- Current equal to the supply current
- Negative current
Answer A fully-charged capacitor blocks further DC current - that is what "fully charged" means.
Two equal capacitors of value C are placed in PARALLEL. What is the total capacitance?
- C / 2
- C
- 2C ✓
- C²
Answer Capacitances in parallel add, since the plate area effectively increases: C + C = 2C.
Two equal capacitors of value C are placed in SERIES. What is the total capacitance?
- 2C
- C
- C / 2 ✓
- C²
Answer Capacitances in series combine like resistors in parallel: equal values halve to C/2.
