The given diagram shows a capacitive circuit. Which of the following vector diagram shows the current lead in a capacitive circuit?
Correct answer: A. Option A
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
In a capacitive circuit, the defining characteristic is that the current leads the voltage by 90 degrees. This means that the peak of the current waveform occurs before the peak of the voltage waveform. Option A correctly illustrates this relationship, where the current vector is ahead of the voltage vector by a quarter cycle. Options B, C, and D either show an incorrect phase relationship or a different circuit type, such as an inductive circuit, where the voltage leads the current.
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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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