- Open circuits have zero current and infinite voltage. In close circuit , current is infinite & voltage is zero.
- Inductor (L).
- It stores energy as a magnetic field
- If L is connected to an AC source, voltage leads the current.
- It acts as a short circuit when L is connected to a DC source.
- Capacitor (C).
- It stores energy as an electric field.
- Current is generated when C is connected to an AC source.
- It acts as an open circuit when C is connected to a DC source.
- The biggest enemy of the electrical system is harmonics. Filters can eliminate them.
- The power factor should be equal or close to unity. Capacitors can improve power factor.
- The voltage drops in series connections, but the current is not affected. Parallel connections allow current to be divided, but voltage is not affected.
- KCL & KVL. These are essential for analysing even one circuit.
- Truth table of AND/OR,NOT,& XOR.
- Faraday’s law: Fleming left-hand rule (motor), Fleming right-hand rule (generator).
- Ground and neutral are two different things. The return path for current is neutral. Grounding connects a terminal to the earth.
- Safety must be assured.
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