Author Topic: ALL PHYSICS QP & MS 01 from 1993 - 2003 AVALIABLE HERE!!!! Rev. Help Links!!  (Read 32109 times)

Offline Ghost Of Highbury

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ohh...
thanks for the info

good luck brother

hope u do extremely well!!

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Offline Ghost Of Highbury

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i just checked out my book it says
" the sum of the currents in the branches of a parallel circuit equals the current entering or leaving the parallel section"

so if a branch (lamp N) is removed
the total sum will reduce

i'm not arguing
just to help you for ur physics exam..

peace.. :)
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Offline Ukhti-R

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Adii ... arent u taking ur examz next year ?   
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Offline Ghost Of Highbury

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yes i am
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Offline Priceless

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adi...just 2 correct u...da total current duznt get reduced....if a lamp is removed....da resistance decreases.....den current wud split according 2 dat

plz correct me if im wrong ;D
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Offline Ghost Of Highbury

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if the effecitve resistance decreases, the the current should increase right

inversely proportoinal??
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Offline hmh

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adi...just 2 correct u...da total current duznt get reduced....if a lamp is removed....da resistance decreases.....den current wud split according 2 dat

plz correct me if im wrong ;D

as far as my brain works... not sure if it does.. but the answer should be A.. as the current wont decrease or increase but jst go thru M only instead of M and N. so i guess you r correct priceless :)
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Offline astarmathsandphysics

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yes if the voltage is fixed

Offline Hope

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The answer to your qn would definitely be C.

And this is because..

When you have M and N..they're connected in parallel. Lamps form resistence..Hence, their overall resistance is less than both, right?

However, when you are left with one lamp, in series with the ammeter.. The resistance is increased.

Thus, the current, is decreased..

If you analyse the circuit, you will see that this proves to be right!

Hope I helped :)

Offline 7ooD

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yes im with hmh and if u r crazy or stupid no offense lol then im with u cuz i think it is A too
pimpin ain't dead it just moved to the web



Offline Priceless

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can anybody giv me this pastpaper cuz i dnt hv it.....i ll like 2 luk at da ques plz....thnku
Don't say "God I have tooo many problems" but say "Problems I have God!"   Gud Luck 2 all 4 xams. Hope v all du well.....fingers crossed LOL

Offline 7ooD

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ok look to end this the ammeter is put where infront of the direction of current so decreasing or increasing or removing all the lamps won't affect it cuz it only measure the current from the cell
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Offline hmh

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can anybody giv me this pastpaper cuz i dnt hv it.....i ll like 2 luk at da ques plz....thnku

Its here lol.. on same topic but jst some pages bak :P
https://studentforums.biz/index.php/topic,2342.45.html
« Last Edit: June 09, 2009, 07:55:13 pm by hmh »
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Offline 7ooD

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found in page 4 and the mark scheme in page 5
pimpin ain't dead it just moved to the web



Offline Ghost Of Highbury

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divine intervention!