In a purely capacitive AC circuit, the current leads the voltage by how many deg

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Question: In a purely capacitive AC circuit, the current leads the voltage by how many degrees? (2022)

Options:

Correct Answer: 90°

Exam Year: 2022

Solution:

In a purely capacitive circuit, the current leads the voltage by 90°.

In a purely capacitive AC circuit, the current leads the voltage by how many degrees? (2022)

In a purely capacitive AC circuit, the current leads the voltage by how many degrees? (2022)

Step 1: Understand what a capacitive circuit is. A capacitive circuit contains a capacitor, which stores electrical energy.
Step 2: Learn about AC (Alternating Current) circuits. In AC circuits, the current and voltage change direction periodically.
Step 3: Know the relationship between current and voltage in a capacitive circuit. In a purely capacitive circuit, the current does not flow at the same time as the voltage.
Step 4: Remember the key fact: In a purely capacitive circuit, the current leads the voltage by 90 degrees. This means that when the voltage is at its maximum, the current is at its maximum a quarter cycle (90 degrees) earlier.

Phase Relationship in AC Circuits – In a purely capacitive AC circuit, the current waveform reaches its peak 90 degrees before the voltage waveform, indicating that current leads voltage.