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?
- 12 Answers
- 32667 Views
- I also Faced
- E-Mail Answers
Answer Posted / nitin
p=v^2/r
now in both cases whtevr the voltage ,it is same for both
bulbs.
now the main culprit is r,the bulb which has more
resistance would glow dimmer as per above formula.
we have used the above formula bcaz ,elctrcl instruments
are designd for constant voltage.
as power is inversely proportonal to the resistance (above
formula)therefor 200w bulb would have less resistance and
glow more
| Is This Answer Correct ? | 13 Yes | 6 No |
Post New Answer View All Answers
I have a 380 KVA DG set. How can i find out 1. My Fuel Consumption per hr ? 2. Electricity produced in 1 Hr. ? 3. If load varies then how does it affect fuel consumption & electricity produced ? Please HELP !!! Really need an answer.
why we use circuit breakers for switching instead of normal switching device?
How do i carry out or know the vector group of a Dyn1 and Dyn5 transformer
how many types of motor can be used in washing machine
why constant voltage transformer should be start without load? and if started then what will happen?
hi everybody how to design string combiner box (scb) internal parameters like bus bar and spd (surge protection device and fuse which place to set that,and also bus bar one particular cross sectional how much heat generated and how much power loss tell me Clearly and briefly
What is safety of Ht panel
What information we need to prepare relay coordination chart
How to calculate the copper in HT motors if KW, RPM & Voltage is given
which type of cabel
HOW DO YOU CAN CHECK A 15KV DIODE, WHETHER IT IS OK OR NOT?
how to get electrical supervisor competency certificate in gujarat. i did 3 year diploma in electrical
what is effect of 5amp fuse on 2mva pry protection of transformer
please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula
How to design harmonic filter at the project stage without nowing the harmonics levels
