Qualification > Sciences
IGCSE PHYSICS
Ghost Of Highbury:
i too did it that way, because resistance of lamp is asked. i saw the markscheme it says 4/0.4
i too think it shud be 1.5/.4
astar may help?
holychalice:
i guess cuz 1.5 V is marked on d lamp its not supplied ...
4V is supplied to d circuit so 4 volts will be taken nd not 1.5
~~~~shreyapril~~~~:
mabir dont argue for the sake!!
they are telling to find resistance for lamp not the whole thing!!!
read the q carefully!!!
Ghost Of Highbury:
the current flowing throught the circuit is same, so v can take 0.4A
but the voltage is different in series circuit, so it shudhere its only asked for the lamp, so it shud be 1.5/0.4
@d!_†oX!©:
--- Quote from: xXFaKeXx on November 08, 2009, 01:28:19 pm ---Can som1 plz tell me wen 2 use sin r/sin i instead of sin i /sin r to calculate the refractive index?
--- End quote ---
u know what it wuold be even better if u use the formula
n1sin1=n2sin2
instead of the above....cuz u will never go wrong wid this...
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