Answer / jigyesh sharma

SINCE TWO BULBS ARE IN SERIES THEY WILL GET EQUAL AMOUNT OF
CURRENT.
BUT AS THE SUPPLY VOLTAGE IS CONSTANT SO BY EQN.P=V^2/R;
SO RESUSTANCE OF 40W BULB WILL BE MORE.
VOLTAGE ACROSS 40 W WILL BE MORE AS V=IR;
SO IT WILL GLOW BRIGTER;

Answer / mithil

40W bulb will glow efficiently.
Because, Current in series connection is always same and
voltage is divided.
here, resistance of 40W bulb is higher than 100W bulb.
so current required to glow a 40W bulb is less than 100W
bulb(it is quite appeared from ratings).so current flowing
from the cicuit is according to the eq.resistance of both
bulb and that would not exceed that current,which can blow
off 40W bulb and less than current which fully glow the
100W bulb.remember formula I=V\R.
(note that bulb is purely resistive load)

Answer / anil

40watt bulb will be very bright ,
The reason 40 watts bulbs have more resistace and
inductance so more voltage drop in series-- more brightes
it.

Answer / harish kumar

Dear Friends,
1. When bulb are connected in series "CURRENT" is same , While "VOLTAGE" will be "DIVIDED" Across Each Ckt According to the Position of the circuit connected (As in Increase order)
2. And Voltage Is directly proportional to Light. If voltage is high than it will glow brightly and if voltage is low it will dim.
3. Now Consider V = 230v,
R1 = 40w
r2 = 100w

So P = V^2/r therefor R1 = (230)^2/40 = 1322.5 ohm
R2 = (230)^2/100 =529 ohm
So According to the OHM's Law V = IR

Resistance Directly proportional to Voltage.
so Voltage Directly proportional to Light.

Hence 40 watt bulb will glow more Brightly rather than 100w.

Answer / elangkumanan

100w,40w bulb was glowing but 40watt bulb very bright
glowing that series connect so bright glowing

Answer / naresh kumar dhal

40 watt bulb.Because it has more voltage drop across it.

Answer / anil hazarika

40 watt blub will glow more brightly because of higher
voltage drop than 100 watt.

Answer / ramesh behera

Current in series connection is always same and voltage is
divided.here,
resistance of 40W bulb is higher than 100W bulb.
resistance of 40 watt is high so less current required to
glow a 40W bulb.
resistance of 100 watt is low so high current required to
glow a 100W bulb.
high resistance so voltage require more for glows = 40watt
glows more
similarly ,low resistance so voltage require less for glows
= 100w glows dim
formula I=V\R.

Answer / guest

bulb of 40 watt will glow more brightly..
reasons in steps>>
1) power is directly proportional to current. so current of
the 100 watt bulb will be more than the current of 40 watt
bulb regardless of the connection.
2) as the current of the 100 w bulb is higher than 40w so,
resistance of 100 w is less than resistance of 40 w.
3) so as glowing is direct proportional to the voltage
across the bulb, and V=IR ...so voltage across 40 watt is
greater than voltage accros 100 watt.so bulb of 40 watt glow
more brightly.

Answer / sunita

in series current is same.but voltage divides resistance of 4ow bulb is more.it will not glow much brighter as 100 w bulb

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