In an AC circuit, what is the phase difference between voltage and current in a

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Question: In an AC circuit, what is the phase difference between voltage and current in a purely inductive circuit? (2021)

Options:

Correct Answer: 90 degrees

Exam Year: 2021

Solution:

In a purely inductive AC circuit, the current lags the voltage by 90 degrees.

In an AC circuit, what is the phase difference between voltage and current in a purely inductive circuit? (2021)

In an AC circuit, what is the phase difference between voltage and current in a purely inductive circuit? (2021)

Step 1: Understand what an AC circuit is. AC stands for alternating current, which means the current changes direction periodically.
Step 2: Know what a purely inductive circuit is. This is a circuit that only has an inductor and no resistors or capacitors.
Step 3: Learn about phase difference. Phase difference tells us how much one wave (like current) is ahead or behind another wave (like voltage) in time.
Step 4: In a purely inductive circuit, when the voltage increases, the current does not increase immediately. It takes time for the current to catch up.
Step 5: The current reaches its maximum value 90 degrees (or a quarter of a cycle) after the voltage reaches its maximum value.
Step 6: Therefore, we say that in a purely inductive circuit, the current lags the voltage by 90 degrees.

Phase Difference in AC Circuits – In a purely inductive circuit, the current lags the voltage by 90 degrees due to the nature of inductance.