Qualification > Queries
ANY DOUBTS HERE!!!
nid404:
--- Quote from: halosh92 on May 30, 2010, 08:07:40 am ---thankyou so much !!! but for the 5b........wat do we do if its constructive interference? and when do we exactly use that formula u gave, when we have to combine phase difference and path difference??
thxxx
and could u do the 2nd variant of the paper:
Q7a (with details) thxxxx alooot
--- End quote ---
when it's constructive interference phase difference would be 0/2pi/4pi...etc.
We use the formula when you are given 2 of the values either lambda,path or phase difference and asked to find the other.
yup hold on for a while ;)
nid404:
--- Quote from: halosh92 on May 29, 2010, 08:02:53 pm ---2nd variant:
Q7a
thankyouuuuuuu
--- End quote ---
7) a
Both are open. No current flows. so max resistance. R= R=V/I I=0 anything divided by zero is not defined actually but ms says infinity...so we stick to that
S1 open S2 closed. Current will pass only through the wire with S2. So resistance will be 2R (cause there are 2 resistors in series)
When both are close. R= combines resistance of 2R in parallel with each other...so combined resistance is R
halosh92:
--- Quote from: nid404 on May 30, 2010, 08:20:59 am ---7) a
Both are open. No current flows. so max resistance. R= R=V/I I=0 anything divided by zero is not defined actually but ms says infinity...so we stick to that
S1 open S2 closed. Current will pass only through the wire with S2. So resistance will be 2R (cause there are 2 resistors in series)
When both are close. R= combines resistance of 2R in parallel with each other...so combined resistance is R
--- End quote ---
thankyou *bows* ;D ;D ;D
nid404:
--- Quote from: halosh92 on May 30, 2010, 08:25:49 am ---thankyou *bows* ;D ;D ;D
--- End quote ---
lol..not a problem :)
halosh92:
same paper 2nd variant
Q2c
isnt change in momentum= m(v-u)
so isnt it supposed to be = 0.78(-9-4.2)
= -10.3 ??????????????
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