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Distribution Board (DB) sizing in residential buildings depends on the connected load, supply type (single-phase or three-phase), current calculation, and number of outgoing circuits. Below is a simple explanation using 2 BHK and...

A transformer is rated in kVA, not in kW. Because a transformer supplies both real power and reactive power. 📌 Power Types in Electrical System TypeSymbolMeaningReal PowerkWActual power used by equipmentReactive PowerkVARPower...

Demand Factor means: How much electrical load is actually used compared to the total connected load. 📌 Formula Demand Factor=Maximum DemandTotal Connected Load\text{Demand Factor} = \frac{\text{Maximum...

PART 1: What is Potential Difference? The Water Analogy - PERFECT for Understanding This Imagine two water tanks connected by a pipe: Tank ATank BWhat Happens?Full (high water level)Empty (low water level)Water FLOWS from A →...

1. How a running motor works: When the motor’s armature (rotor) spins in the magnetic field, it acts like a generator, producing a voltage called back EMF. This back EMF opposes the supply voltage. The net...

What is Neutral? Neutral is the return path for electric current in an AC system. Electricity always needs: a go path (Live / Phase) a return path (Neutral) Without a return path, current cannot flow — just like water can’t...