Categories
Uncategorized

AC Circuits: Lead and Lag(How to memorize)

Most of the people I’ve come across have problems memorizing the basics of Electrical Engineering like the phenomenon of Lead and Lag of Current and Voltages in A.C.(Alternate Current) Circuits shown below.

Resistor in AC Circuit

When a Resistor is present in an AC Circuit, then the current is in phase with the voltage and the converse is also true.

Inductor

When an Inductor is present in an AC circuit then Voltage leads current by 90 Degrees.

Capacitor

When a Capacitor is present in an AC circuit then Current leads Voltage by 90 Degrees.

Easy way to memorize the above without any sort of confusion is by recollecting the wordCIVIL every time. CIVIL is a mnemonic here.
Here, we suppose the following
C–>Capacitor
I—>Current
V–>Voltage
I—>Current
L—>Inductor
This implies that in the word CIVIL when C is present, I leads V and when L is present V leads I.

Also Read: Resistor Color coding: How to Remember + Online Calculator

If you have any quiries please feel free to comment below.