if the voltage across the lamp drops by 1%, the power drawn will be reduced by

Categories >> Engineering >> Electrical Engineering
Suggest New Category

if the voltage across the lamp drops by 1%, the power drawn
will be reduced by how many %?

Question Posted / kabindra

5 Answers
24397 Views
PSPCL, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

if the voltage across the lamp drops by 1%, the power drawn will be reduced by how many %?..

Answer / eee

Power = V(square)/R

If voltage is reduced by 1% power will drop by
.99*.99 = .9801

(1-0.9801)*100

Power is reduced by 1.99%.

Is This Answer Correct ?

58 Yes

11 No

if the voltage across the lamp drops by 1%, the power drawn will be reduced by how many %?..

Answer / nirmal maity

Let, voltage across the lamp =100v and resistance R =100 ohm
so, power P =v*I = 100*1=100W {I =V/R =100/100=1 }
If the voltage across the lamp drops by 1 percentage , then present voltage is 99v
Then present power drown by the lamp whose resistance R =100 ohm is P =V^2/R = 98*98/100 = 98.01W .
So power drop of the lamp is 100-98 =2 w

so the power drawn will be reduced by 2percentage

Is This Answer Correct ?

29 Yes

9 No

if the voltage across the lamp drops by 1%, the power drawn will be reduced by how many %?..

Answer / wareagle

Watts = E x I
I = E/R
W = E x E/R = .99E x .99E/R = 0.98 watts

Is This Answer Correct ?

10 Yes

9 No

if the voltage across the lamp drops by 1%, the power drawn will be reduced by how many %?..

Answer / k.prakashchandra

If you connect phase and neutral across the bulb the voltage
should fully drop.1% drop is possible if there are 99
similar bulbs in series with it or a resistance of 99 times
the bulb resistance.

Is This Answer Correct ?

1 Yes

10 No

if the voltage across the lamp drops by 1%, the power drawn will be reduced by how many %?..

Answer / brijesh soni

if you will conect the lamp drop by 1% the power drown by
the bulb will be 1%

Is This Answer Correct ?

2 Yes

17 No

Post New Answer

More Electrical Engineering Interview Questions

High Voltage out door substation-annual maintenance, things to be considered

1 Answers

How many energy meters can be connected on a 15VA Voltage transformer. please send a calculation sheet.

0 Answers

Alternators are invariably star connected why?

4 Answers

why are use star delta startor.

4 Answers

If any one's require of phoenix contact like( relay , termilnal block , surge protection device ) , product please contect me 09878206357 chetan verma

0 Answers

According to general circuit diagram of 1-Phase t/f , why the primary is not get short circuited ,even though the supply terminals both are directly connected through primary winding?

4 Answers

why the undervoltage relay's interlock is used in earthswitch closing operation of the 400kV line scheme?

2 Answers

List of equipments required foe industrial repair lab.

0 Answers

How can we design a HVAC Plant room which includes AHU,FCU,Chillers,Cooling towers, Pumps etc & how will they work? any Drawing if possible?

0 Answers TCS,

IS it possible for a feedbacksurge to travel over a wireless connection?

1 Answers HP,

What is the difference between earthed & unearthed system?

2 Answers HCL,

I have done my m.tech in electrical engg discipline. Can any one please suggest me how should I prepare for getting into phd in iit or nit.How should I prepare for getting into lecturership

0 Answers

For more Electrical Engineering Interview Questions Click Here