connected using star connection in the diagram given below.a. What do

1.	connected using star connection in the diagram given below.a. What do you call the point N which is earthed in the circuit? b. State the voltage differences between two phases and between a phase and neutral line in a star connection. c. Which of the connected bulbs will glow? Why? d. Two houses have electric connection from the same distribution transformer, but unfortunately one of the houses suffers power failure frequently; Explain it on the basis of household distribution.
Answer» a. Neutral point. b. 400 V in between two phases. 230 V in between a phase and neutral. c. B4 glows because it is connected between the lines phase and neutral B, and B2 glows with low brightness. Each bulb gets 200 V as it is connected in series with 400 V. d. Three phases in a transformer have separate fuses. So power supply problem in a line need not affect the other phases.

connected using star connection in the diagram given below.a. What do you call the point N which is earthed in the circuit? b. State the voltage differences between two phases and between a phase and neutral line in a star connection. c. Which of the connected bulbs will glow? Why? d. Two houses have electric connection from the same distribution transformer, but unfortunately one of the houses suffers power failure frequently; Explain it on the basis of household distribution.

Answer»

a. Neutral point.

b. 400 V in between two phases. 230 V in between a phase and neutral.

c. B4 glows because it is connected between the lines phase and neutral B, and B2 glows with low brightness. Each bulb gets 200 V as it is connected in series with 400 V.

d. Three phases in a transformer have separate fuses. So power supply problem in a line need not affect the other phases.

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