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
24266 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

what is the consuption rating of motor in one day

1 Answers

In a star-star connected h.t transformer why we use NGR on the secondary (l.t)side.

3 Answers Star, TATA,

how to calculate current carring capacity of cable and cable selection? 1) copper flexible cable 2) copper armoured cable 3) Aluminium cable

0 Answers

why should we connect the no load components in a equivalent circuit of transformer in parallel?why cant it be in series.

3 Answers

hi friends ,iam working as genset AVR service engineer in electrical field from past 2 yrs throughout india . i plan to shift in some other job without travelling in same field because i con't travel,i dont know what i do for that so please guide me what job is suited for me,how i can serch the job please anybody helpme iam totally confused

4 Answers

what happens to a turbo alternator if it get trip and 1 out of 3 poles of circuit breaker in close condition

1 Answers wbsedcl,

what is the difference between 2 way and 4 pole selector switch???

0 Answers Allied Group,

Is an SCR semi controlled device?

4 Answers IOCL,

For 35 HP motor how much amount of capacitor should be on in kvr to reduce the current bill

1 Answers

we have amp, voltage, kw, length detail then how to calculte copper & alluminium size of conductor of 3-phase induction motor

0 Answers

What does the a,b,c of 95a,95b,95c relays denotes?

0 Answers KSEB,

What are the differents between Breaker & Contactor?

8 Answers

For more Electrical Engineering Interview Questions Click Here