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two bolbs of 100w and 40w respectively connected in series
across a 230v supply.which bolb will glow bright and why?
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Answer Posted / 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.
| Is This Answer Correct ? | 54 Yes | 18 No |
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