phydis said:"when we apply AC to an inductor (pure inductance), the current will lag the applied voltage by 90 degrees. "
how this happens? why current lags applied voltage by 90 degrees?
However, calculus is a great way of describing many processes and makes it possible to get more useful answers than words can, on their own.When an alternating current (AC) is applied to an inductor, the inductor will resist the change in current by inducing a voltage in the opposite direction. This is known as self-inductance and is the basis for how inductors function in circuits.
An inductor will have a higher impedance (resistance to current flow) at higher frequencies, meaning it will be more difficult for current to flow through it. This can result in a phase shift, where the voltage and current in the inductor are not in sync, which can affect the overall frequency of the AC signal.
Inductors are commonly used in AC circuits for a variety of purposes, including filtering out unwanted frequencies, stabilizing voltage levels, and controlling the flow of current. They can also be used in combination with capacitors to create resonant circuits for specific frequency applications.
The size and shape of an inductor can impact its inductance, which is a measure of its ability to store energy in a magnetic field. Generally, a larger inductor will have a higher inductance and can handle more current, while a smaller inductor may have lower inductance and be more suitable for higher frequency applications.
Yes, inductors can also be used in DC circuits, although their behavior will differ from when they are used in AC circuits. In DC circuits, an inductor will act as a short circuit until the current reaches a steady state, at which point it will act as an open circuit. This can be useful in smoothing out fluctuations in the DC current.