In a 3 phase,400v,4 wire system, 2 incandescent lamps, one
having 230v,100w and the other 230v,200w are connected between
r phase- neutral and y phase-neutral respectively. If neutral
wire breaks which lamp will fuse first and why?

Answer Posted / awdhesh

When neutral disconeted bulb are in series so ckt current is same but voltage drop is diffrent.vlt drop is propesanl to R so 100W lamp R is more with respect to 200W. 100 W lamp fuse first.

Is This Answer Correct ?    36 Yes 5 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

why fractional pitch winding generally used in alternators?

2446


what is the excess air in furnace

1587


what is the working principle of energy saver control panel. please give the complete calculation & theory.

1827


what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?

1465


hi, i have 3x200KVA and 2 x 80KVA UPS with battery bank of 150AH 68Nos. and 100AH 204Nos., i need to install AC either ductable or PAC type, so can you help me to calculate heat load and capacity of the AC to install.

2330






How to Calculate KA Rating of Main LT Panel

1164


what things to be considered when designing UPS

1299


What types of CMOS memories have you designed? What were their size? Speed? Configuration Process technology?

3135


sir i am apearing for nic exam.i dont know exam pattern.can you please send me some model papers

1493


Can Anyone suggest the Standards (IEC or IS) for selecting copper current density?

909


What is center gravity load in substation?

1930


Why is back emf used for a DC motor? Highlight its significance.

693


what will happen if earth of 33 kv cable (earthed system) is not connected to earthing pit?

1536


send me all basic electrical question and answers

2529


how we can adjust for three phase motor cold stall time ,hot stall time and thermal register set up?

2502