Chapter 04: RL and RC circuits

What are RL and RC circuits? How are they formed? What is the difference between them? Find the answers to all this, and more!


The RC circuit involves the charging of a capacitor through the external supplied voltage. Initially, when the switch is closed, the resistance offered by the RC circuit is zero. This is because the capacitor is uncharged, after sometime when the capacitor is fully charged then as no more voltage is required the resistance offered by the RC circuit is infinite.

The RL circuit consists of resistance and inductance connected in series with a battery source. The current from the voltage source experiences infinite resistance initially when the switch is closed. As soon as the RL circuit reaches to steady state, the resistance offered by inductor coil begins to decrease and at a point, the value of resistance of RL circuit becomes zero.


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