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
22468 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 Should be the rating of transformer used in 33KV substation?

3 Answers

why the field winding in dc motor is not short circuited eventhough dc supply is applied across the winding

0 Answers Torrent Pharma,

limitation of conductor height on ground when we consider EMC

0 Answers

can v rotate single phase induction motor in both the direction...?

1 Answers

why we dont store the ac power in battery?

1 Answers TCS,

why the vfd motor take current high in vfd panel then mcc panel.current in vfd panel=160A in 93%.and mcc panel it shows 130A. (132kw motor)

1 Answers

How shall i select the value of capacitor or inductor in a system?

0 Answers

why are maintine power factor 0.99 in Eb line? why are used capacitor bank in Eb line? what is the purpose capacitor bank?

4 Answers TNEB Tamil Nadu Electricity Board,

our plant maximum demand has 500 kva.need to suggest me to maintained pf 0.98.how much capacitor bank will be connect to the supply line.

1 Answers

State superposition theorem?

0 Answers

What is the necessary and sufficient condition for stability.

0 Answers

What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

0 Answers

For more Electrical Engineering Interview Questions Click Here