Technician 2026-2030T5C01
What describes the ability to store energy in an electric field?
D
Answer
Electrical principles and math
Type
A
Inductance
B
Resistance
C
Frequency
D
Capacitance
Answer Notes
Capacitance is the physical property of a circuit that allows it to store energy in an electric field. This is typically achieved using a component called a capacitor, which consists of two conductive plates separated by an insulating material known as a dielectric.
When a voltage is applied across the capacitor, an electric field builds up between the plates, storing energy. This fundamentally differs from inductance, which is the ability to store energy in a magnetic field, usually created by a coil of wire.
Understanding the difference between an electric field (capacitance) and a magnetic field (inductance) is crucial for basic electronics. Resistance simply opposes current flow and dissipates energy as heat, while frequency relates to alternating current cycles, not energy storage.
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What is the unit of capacitance?