Interested to Buy Any Domain ? << Click Here >> for more details...
when 40 watts and 60 watts bulb is connected in series,
which bulb glows brightly ?
- 5 Answers
- 17725 Views
- I also Faced
- E-Mail Answers
Answer Posted / wareagle
Ksb Quote "40 wattbulb has higher resistance(1440) so a
low current pass through it but 60 watt has low resistance
it glows brightly" That would be true if the bulbs are
connected in parallel but they are connected in series.
Read the question. Do you know what that means?
Ksbn That is incorrect. Lets find the answer.
Voltage = 240 volts
Watts = 40 watt and 60 watts
R60 = 240x240/60= 960 ohms
R40 = 240x240/40= 1440 ohms
Total of R60 + R40 = 960 + 1440 = 2400 ohms for series ckt
Amps = 240/2400 = 0.10 amps flowing thru both 40w and 60w
watts = amp²x R
watts for 60 watt = amp²x R = 0.10² x 960 = 0.01 x 960 =
9.6 watts
watts for 40 watt = amp²x R = 0.10² x 1440 = 14.4 watts
Therefore 40 watt is brighter.
Remember the bulbs are connected in series not parallel.
| Is This Answer Correct ? | 38 Yes | 1 No |
Post New Answer View All Answers
why co incidence factor considered in transformer sizing?
what is doid
what is the difference between elcb and rccb ?
draw a circuit diagram connecting transformer OLTC- RTCC- VCB-Marshalling Box otherwise Explain in words
some time we open engine breaker 8.0 MW load but plant not trip. and another time engine open 4.0 MW load engine trip why? individually engine breaker open & individually emergency stop why difference?
write a c++ code that receives an integer number and display the sum of the number and its revers integer?
How does a television work?
High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?
why and how current drawn by battery charger depends upon the altitude where it is located?
can we use engine degreaser for electrical motors?
How to calculate the time setting for star connection in star delta starter? For example 10KW 3PH Induction motor.
Why synchronous motor is used in power factor improvement,dc series in lift
How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?
i want use the cable size 16cx4 core aluminium usege watts 240x2000w this cable size is correct?
what are the protecyion of transformer & generators
