An electric bulb is connected on a holder. One end of the wire is connected to the phase and the remaining one connected to earth instead of neutral. The bulb will glow or not? If yes then what is the need of neutral?

An electric bulb is connected on a holder. One end of the wire is connected to the phase and the remaining one connected to earth instead of neutral. The bulb will glow or not? If yes then what is the need of neutral?
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1 Answer

Answer :

1. Yes the bulb will be glow & neutral is return path of Circuit it is originated from distribution transformers star point, form this point only neutral is taken. 2. Then what is the need of neutral? We can connect the secondary of transformer as delta 3. Generally all the distribution transformers have Primary DELTA and Secondary STAR connection. The neutral of the STAR is grounded. So the bulb will glow if connect across PHASE and NEUTRAL or PHASE and GROUND. 4. The need of Neutral: It gives assurance of reliable centralized earthling as your home may or may not have reliable earthling.
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