what if inductor is directly connected to dc supply
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Inductor is nothing but a choke coil, or a Cu wire wound on your back of your pencil.
When a current passes through any conductor, it produces a magnetic field around it. And due the shape of the Inductor is such that it will produce a magnetic field with flux lines leaving at one end and coming back at other.
So for a DC is concerned, inductor acts as an Magnet, hence its called as electromagnet.
For AC, the behavior is different.
In AC, current is not constant. Current keeps changing. So does the magnetic field changes, due to change in current. And since this changing magnetic flux is linking with the coil itself, it induces an emf - and if the circuit is closed, the current flows through it. (This is in opposition with the cause producing it - Lenz law.)
So there is an opposition to AC.
More the frequency, more is the change in flux and more is the opposition.
So inductor doesn't like to pass AC through it, hence this is used in rectifiers: when you want to convert AC into DC, for smoothing the current.
Inductor are used both with AC and DC, but application is different.
Thank You
Inductor is nothing but a choke coil, or a Cu wire wound on your back of your pencil.
When a current passes through any conductor, it produces a magnetic field around it. And due the shape of the Inductor is such that it will produce a magnetic field with flux lines leaving at one end and coming back at other.
So for a DC is concerned, inductor acts as an Magnet, hence its called as electromagnet.
For AC, the behavior is different.
In AC, current is not constant. Current keeps changing. So does the magnetic field changes, due to change in current. And since this changing magnetic flux is linking with the coil itself, it induces an emf - and if the circuit is closed, the current flows through it. (This is in opposition with the cause producing it - Lenz law.)
So there is an opposition to AC.
More the frequency, more is the change in flux and more is the opposition.
So inductor doesn't like to pass AC through it, hence this is used in rectifiers: when you want to convert AC into DC, for smoothing the current.
Inductor are used both with AC and DC, but application is different.
Thank You
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