if 40 watt bulb has higher resistance then a 100watt bulb
then according to joul farmula p=I^2R the 40 watt bulb more
power consume then 100 watt bulb.
- 5 Answers
- 12423 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / baljinder singh
According to I=V/R. The resistance of 40W bulb is high than
100W bulb , but current flowing in it low rather than 100W
bulb. The Power= I^2R. The current is multiply with own
first ,because it has square ,and then it multiply with
voltage. So when current is decrease the power is consume by
bulb is less..
| Is This Answer Correct ? | 30 Yes | 4 No |
Answer / joydeep kr. chakraborty
The Joule's formula P=I^2R holds good only if I through
them is Constant. But, when connected accross same voltage,
the current through a 40W bulb is less than a 100W bulb.
Thus, I^2R for 40W bulb will be much much less than that of
a 100W bulb.
If we connect them in SERIES and apply voltage to the
combination, the current passing through them will be same,
and in that case, the 40W bulb will definitely CONSUME MORE
POWER THAN 100W BULB.
| Is This Answer Correct ? | 5 Yes | 4 No |
Answer / osho katyal
In domestic lines,we got parallel connections. So formula
P=V2/R is applicable .As such P and R are inversely related.
So power less more resistance less cureent.
| Is This Answer Correct ? | 4 Yes | 5 No |
Answer / kiran
even if u take the resistance of 40 watt bulb higher than
100 watt bulb,as the current varies square(I^2) the power
consumption,so power consumed by 100 watt is higher than
former........
| Is This Answer Correct ? | 2 Yes | 3 No |
Answer / manda.gopal1
I think that 40 watt bulb has more impidence then 100 watt
bulb. 40 watt bulb offer higher impedence then 100 watt bulb
| Is This Answer Correct ? | 3 Yes | 12 No |
what is the contact resistance of sf6 circuit breaker??
what do u mean by starting torque? how it should be for a good motor? what is the relation between starting torque and power factor? What is the relation between efficiency and starting torque?
What is the battery voltage limit
I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.
What is the difference between electronic regulator and ordinary rheostat regulator for fans?
what is the function of commutator in dc motor?
Can VFD step up to 60 Hz if it is designed to receive 50 Hz input?
The knee point of a current transformer is normally unique and known.So why in the nameplate of a CT they put the minimum value like this Vk> 400v.
why the single phse machine can not run by the three phase supply.
in a silicon diode we can measure .7v in a voltmeter.but why we can't use this voltage for using?
what is the purpose of high speed earth switch in gas insulated substat
which is best ac or dc
-
Civil Engineering (5085) - Mechanical Engineering (4451)
- Electrical Engineering (16632)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
