if 100W and 200W bulbs are connected in series to a supply
which bulb will glow brighter and why
Answers were Sorted based on User's Feedback
Answer / neeraj
100W bulb will glow brighter.
Suppose they are first connected individually (to find their
resistance), we will find that resistance R=V^2/P will be
higher for 100W bulb.
Now, when two bulbs are connected in series, current through
each of them is same so the thermal energy produced per
second i.e. I^2.R will be higher for 100W bulb which
accounts for its high brightness.
|Is This Answer Correct ?||48 Yes||6 No|
Answer / chaturbhuj poddar
If the rating of two bulbs be as (100W-220V) &(200W-220V)and be connected in series to the same d.c.voltage supply. then the value of current is same in both the bulbs. It can be seen that the resistance of 100W bulb is greater than the resistance of the 200W bulb. Hence, heat produced in 100W bulb is more than produced in 200W.Conclusion: 100W will glow brighter than 200W bulb.
|Is This Answer Correct ?||31 Yes||9 No|
Answer / guest
100w because resistance will be higher
|Is This Answer Correct ?||4 Yes||6 No|
Let us suppose that the first bulbs is marked as 100W-200V and the second bulb as 200W-200V, and both are connected in series to 200V d.c. supply to make easy calculation.
Resistance of 100W bulb R1 = V^2/P = 200*200/100 = 400 ohm,
Resistance of 200W bulb R2 = V^2/200 = 200*200/200 =200 ohm
Thus, Resistance of the combination = =600 ohm. current through each bulb = V/600= 200/600 =1/3 A
Heat produced by 100W bulb per second H1=I^2*R1=(1/9)*200J/sec
Heat produced by 200W bulb per second H2=(1/9)*400 J/s.
H2 is greater than H1. Thus, 200W bulb will glow brighter.
|Is This Answer Correct ?||14 Yes||38 No|
Answer / l.shanmugam
* both are bulbs same bright
* if the bulb are series conection power supply same as
series conection so both are bulbs same bright
|Is This Answer Correct ?||7 Yes||38 No|
How fast can a shadow move ? If a moth fly's in front of a very bright room temperature light powerful enough to light up Saturn like the sun could it's shadow move faster then light if there was no light diffusion.
What is the difference between a vector and a phasor?
we know when two atom combine,the electrions are in valance band,but in case of semiconductor doner or acceptor level are above of v.. whyb
Mercury thermometer is constructed as shown in Figure The capillary tube has a diameter of 0.004 cm, and the bulb has a diameter of 0.250 cm. neglecting the expansion of the glass, find the change in height of the mercury column that occurs with a temperature change of 30.0 °C.
While swimming, why do we press the water backward with our arms and hands ?
WHAT TI THE REASON FOR THE NOISE PRODUCED IN THE TRANSFORMER?
i am a student of 10th class ,i like science and maths but i score bad in maths.wat shud i take in future...commerce or science?
The principle of action of points is used in A. capacitors B. inductors C. resistors D. lightning arrestors
when taken to the top of a mountain, a clock will go fast or go slow or no change or stop ?
what is the proper defination of 'LIGHT'
which type of component is transformer
Why does the moon shine, evening though it has not light of its own ?