two bolbs of 100w and 40w respectively connected in series
across a 230v supply.which bolb will glow bright and why?
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 |
Post New Answer View All Answers
what is the current setting for different relay protection for transformer .
how to deside the capacity of chock for drive?
An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?
state the disadvantages of carbon filament???
Differentiate between Zero and Negative sequence current
what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end
how can i determine the KVA/MVA rating of transformer precisely?? is there any standard test?????
what is earth pit , how we can measured it, what earth rods reference
hi friend i am going too attend for hpcl in this month please help me by sending written test question papers i am in the stream of E.E.E
Explain forward resistance, static resistance and dynamic resistance of a pn junction diode.
slipring induction motor starting time Lrs operating why lrs starting time lrs outer body didn't get shock
Why derating factor os applied on Cables?
what could be the RMS value and average value of a 4 phase sine wave?
Dear all, I'm manikandan I have done by DIPLOMA EEE from 2011 , I have 5 years of experience from Power plant instrumentation field , which one field is give long life & which one field is best ,I confused a lot and also I'm studying AMIE, can I choose which department from Section B examination? pls tell me
plz explain the auot-reclosing circuit in electrical engineeing