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R1 = R2 because think about it, forget the strings and all, what exactly is R balancing ?
What i dont understand is that Pd across J to F why do we take current I1 shouldnt it be I2?ii) The trick in this question is that wire BF needs to be split into two separate sections because the current in it changes. The resistance is also R2/2 in each section.
Kirchoff''s second basically law says Sum of EMFs=Sum of PDS
E1=PD across r1 + PD across R1 + PD across (B to J)+ PD across (J to F)
E1=I1 x r1 + I1 x R1 + I2 x R2/2 + I1 x R2/2
iii) Applying same law as before to a different loop.
E1-E2=-(PD across r2) + PD across (J to F) + PD across R1 + PD across r1
E1–E2 =–І3 x r2 + І1 x R1 + І1 x r1 + І1 x R2 / 2
be more specific like paper and question partAS PHYSICS
M/J/2010
Q3(c), Q6(ii)
What i dont understand is that Pd across J to F why do we take current I1 shouldnt it be I2?
PAPER 2be more specific like paper and question part
22 23 or 21?PAPER 2
nov 2002 q3bii) the freq is 1/2fo so time will be 2T. means after twice of time period the oscillation will be forced. so every alternate oscillation is energized. and every pulse increases the amplitude. it is a resonance like processAssalamoalaikum wr wb!!
PAPER 4 doubts...
June 2002
· Q:4 b & c· Q:6a how should we draw that...? :s
Nov 2002
· Q:3 b(ii)
Nov 2003
· Q:5 b (ii) need explanation, I don’t get it... :s· Q:4 c Can you show, how is the less ripple represented, please.. :s· Q:2 b (ii) –ve sign?
June 2004
· Q:4 c reason for the answer...· Q:6 I’m totally blank abt this...i don’t get how they worked this out..· Q:8 iii who said we didn’t use them? :sJune 2005
·Q:5b·Q:6b
Nov 2005
·Q:3 I’m sorta confused with the calculation...part b ...and I don’t understand why they give the ans to C to 2s.f when they’re penalising 2s.f in part b?·Q:4 c Why speed max when displacement is zero? :s·Q:5b(ii) why when speed is reduced, deflection is larger? :s·Q:6 b I don’t understand·Q:6 c (ii) which way do we do...negative of the upper graph gradient?
June 2006
· Q:2 b (ii) how to do?? :s·Q:4 c can you show, plz?·Q:6 a what I understand is the field should be circle..right? I don’t get this :s· Q:6 c what do I write for this?· Q:7 Can you answer the complete question, I couldn’t do this one... · Q:8 a For such questions where exactly are we supposed to draw the arrow? Like beside the paper shown..or inside that region? Where do we show....?Nov 2006
· Q:3 c what to write? :s· Q:4 b ans. Is 5.99 x 10^24 how does ms say 6.00 :s· Q:5 a (ii) what’s eddy current?· Q:6 a (ii) How do the diode works then, normally...isn’t that the way we usually connect? :sJune 2007
· Q:3 d (i) Why is the answer zero? Just to confirm, is it because E=F/Q and F = ma so E is proportional to a...and hence a will be max. when E is max? is it?· Q:4 c (ii) How’ll the diagram be? :s· Q:7 b I don’t get why the damping is reduced...i took it as, resistance is increased, more power dissioated, hence more energy losses...so oscillations die off quicker..but it say damping is less..:s confused..· Q:7 c (iii) can you give some examples? :sI'm sorry for so many doubts, but please can you answer them by few at a time..Jazak Allahu Khairen..
sorry....my mistake..i updated the list ..nov 2002 q3bii) the freq is 1/2fo so time will be 2T. means after twice of time period the oscillation will be forced. so every alternate oscillation is energized. and every pulse increases the amplitude. it is a resonance like process
didnt i give u the ans before when u posted the same ques?
sorry22 23 or 21?
3(c)be more specific like paper and question part
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