Which one is a variable capacitor
Correct answer: B. Air gap capacitor
- A. Ceramic capacitor
- B. Air gap capacitor
- C. Variable electrolytic capacitor
- D. Silver capacitor
Explanation
Correct. Air gap capacitors have a variable capacitance, which can be adjusted by changing the separation between the plates.
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About Electrostatics
Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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