a bulb of 100W and anather bulb of 200W , rated supply
voltage 230v.when supply voltage is reduced to 100v,which
bulb will give more light? and why with calculation?

Answers were Sorted based on User's Feedback



a bulb of 100W and anather bulb of 200W , rated supply voltage 230v.when supply voltage is reduced..

Answer / boopathi

power =current*voltage
100w and 200w pulb are glowing in 230v resrectively.
reduced the current means voltage.also reduced the current .
so more current is take to the 100w bulp.not enough of
cuurent is take the 200w.

Is This Answer Correct ?    12 Yes 16 No

a bulb of 100W and anather bulb of 200W , rated supply voltage 230v.when supply voltage is reduced..

Answer / pravesh

if the bulbs are connected in paralled then both bulbs will
glow equally but is cannected in series the first bulb will
glow brighter , as in series current is always same and but
in parallel circuit voltage is same

Is This Answer Correct ?    4 Yes 11 No

Post New Answer

More Electrical Engineering Interview Questions

what is the power ratio between power in star and delta circuit?

3 Answers  


Difference between 3.5 core and 4 core

2 Answers  


The control system is used for?

3 Answers   CCP, NTPC,


what is the change over switch ,switch disconnector ,bypass switch and switch disconnector fuse unit?

1 Answers  


why transformer is rated in kva?

2 Answers  






What are the site acceptance tests for power cables, DG Sets, LT panels & 30kVA UPS ?

0 Answers  


how to increase senstivity of ct

0 Answers   NPCIL,


will we get shock from dc?

12 Answers   L&T,


what is the principal of starting of a three phase induction motor.

2 Answers   Moser Baer,


what is cogging and crawling

20 Answers   ABB, Ashok Leyland, Bharat Bijlee, BMRCL, MN Dastur, Siemens,


what is real and reactive power?

2 Answers  


how electronic energy meter works?

2 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16632)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)