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Questions and Answers
What is the purpose of a capacitor in an electrical circuit?
What is the purpose of a capacitor in an electrical circuit?
- To increase resistance in the circuit
- To store and release electrical energy (correct)
- To convert electrical energy into mechanical energy
- To regulate the flow of current
Which factor determines the capacitance of a capacitor?
Which factor determines the capacitance of a capacitor?
- The type of material used in the construction of the capacitor
- The surface area of the capacitor plates and the distance between them (correct)
- The voltage applied across the capacitor
- The length and thickness of the connecting wires
What is the function of an inductor in an electrical circuit?
What is the function of an inductor in an electrical circuit?
- To convert electrical energy into heat
- To amplify the voltage in the circuit
- To oppose changes in the current flowing through it (correct)
- To store and release electrical energy
How does the inductance of an inductor change if the number of turns in the coil increases?
How does the inductance of an inductor change if the number of turns in the coil increases?
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Study Notes
Capacitors
- A capacitor stores energy in an electric field when a voltage is applied across it.
- The capacitance of a capacitor is determined by the surface area of the plates, the distance between them, and the type of dielectric material used.
Inductors
- An inductor stores energy in a magnetic field when a current flows through it.
- The primary function of an inductor in an electrical circuit is to oppose changes in current.
- If the number of turns in the coil of an inductor increases, the inductance of the inductor also increases, as the magnetic field around the coil becomes stronger.
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