Interested to Buy Any Domain ? << Click Here >> for more details...
One 200 V, 100 W bulb is connected in series with primary of
a 200 V, 10 kVA transformer. If its secondary is
kept open circuited, then the bulb would have
(1) Full brightness (2) Poor brightness
(3) A little less than full brightness (4) More than full
brightness...explain
- 2 Answers
- 9376 Views
- I also Faced
- E-Mail Answers
Answer Posted / ajayiet
when transformer secondary
is open it is at no load means
only no load current will flow
to supply the losses .but luk at
the rating of machine 10000
va so full load current is 10
kva/200 v i.e. 50 amp.now no
load current is 2 to 6 percent
of full load current i.e. 1 to 3
amp.resistance of lamp is 200
ohms so at no load wattage
i^2R is from 200 to 600
watt.so bulb will be
damaged.option is more
appropriate.
| Is This Answer Correct ? | 2 Yes | 5 No |
Post New Answer View All Answers
We have 110Vac ,10A ac supply which is converted into 110VDC & How much DC current? which factor is reqired for dc current calulation?
Why we use circular(Stepped) cross section in transformer core?
What are the advantages and disadvantages of the dc motors?
Why is negative feedback invariably preferred in closed loop system?
why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?
In synchronization circuit what is the function of Interposing voltage transformer(IVT)and Reverse voltage transformer(RVT)
How is the gain affected by the introduction of feedback in a control system.
why is the conservator tank painted white on the transformer
What is meant by RVT and NDR ? expansion and details of it
How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?
for a 400kv t/m line with 10 ampere current will corona occur?
Bimetal strip used in overload relay what is that,which types of material used for that & percentage.
What is the role of Dedicated earthing in UPS System?
Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???
what transformer we used normally and upto which kva?
