A simple way to visualize theories through diagram
1
Visualization of the flow of AC and DC. Half positive and half negative cycle of AC.

2
Phasor diagram of Purely resistive circuit:

3
Phasor diagram for Purely Inductive circuit:

4
Phasor diagram for purely capacitive circuit:

5
Alternating current and the flow of water analogy:

6
The resonant frequency of series and parallel LCR circuit:

7
To understand the RL and RC circuits:

8
Working of a transformer:
