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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 230661 times)

Offline the_grim_reaper

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1515 on: May 25, 2010, 08:13:42 pm »
Quote from: ~VIN1094~ on May 25, 2010, 08:08:50 pm
but u got it how to do it right ??

Oh yeah yeah I know how to do this, By the way, is my answer correct? (To your question?) I mean the one you asked from me.
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Offline Naruto123

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1516 on: May 25, 2010, 08:14:40 pm »
may june 09 ppr 1 variant 1 ques 34
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Offline Shazizzzle

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1517 on: May 25, 2010, 08:15:09 pm »
Yeah.
That was a typo. :P
I wrote 1.92 X 2 = 3.84 before, I wrote it again for 20 hours, whereas I should've taken 3.84 X 2 for 20 hours.
Anyways, post edited! :P
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Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1518 on: May 25, 2010, 08:15:39 pm »
Quote from: 8T on May 25, 2010, 07:58:54 pm
Folks..Anyone could assist me withMay 07 q 27 ??
Ans is B but i chose A .. Why is it the way it is?



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Offline The Golden Girl =D

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1519 on: May 25, 2010, 08:16:59 pm »
someone plz explain to me june 2003 Q 24


VIN , did u kill chem ppr 1 ?  ::)
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1520 on: May 25, 2010, 08:17:10 pm »
Quote from: 123456789 on May 25, 2010, 08:14:40 pm
may june 09 ppr 1 variant 1 ques 34
ok try this, make ur fingers as shown in the diagram...the way the fingers are wrapped around show how the magnetic lines will be...
check the diagram..check the red arrows which indicate the magnetic field an and direction..

only the red arrow near C matches the compass arrow..


I AM BACK! COULDN't SLEEP! :P
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Offline $H00t!N& $t@r

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1521 on: May 25, 2010, 08:17:43 pm »
need help with m/j 2006 q21
i always get confused with such stuff. ive seen it in many past papers. how do you know if the waves will refract or not and whether the wavelength will vary???
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Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1522 on: May 25, 2010, 08:18:25 pm »
Quote from: ~VIN1094~ on May 25, 2010, 08:15:39 pm



You trapped me ..I got it (:
Thanks Dude xD
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Offline Adzel

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1523 on: May 25, 2010, 08:18:50 pm »
Quote from: 123456789 on May 25, 2010, 08:14:40 pm
may june 09 ppr 1 variant 1 ques 34
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1524 on: May 25, 2010, 08:20:36 pm »
Quote from: the golden girl on May 25, 2010, 08:16:59 pm
someone plz explain to me june 2003 Q 24


VIN , did u kill chem ppr 1 ?  ::)


B - sound wave longitudinal wave..Longitudinal waves are waves that have the same direction of vibration along their direction of travel
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Offline WARRIOR

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1525 on: May 25, 2010, 08:21:53 pm »
Quote from: Shooting Star on May 25, 2010, 08:17:43 pm
need help with m/j 2006 q21
i always get confused with such stuff. ive seen it in many past papers. how do you know if the waves will refract or not and whether the wavelength will vary???
first of all FREQUENCY NEVER CHANGES.


speed adn wavelength only changes whn somethin gets refracted

the speed slows down and wavelength decreases if ur goin to a deneser medium and the opposite happens if ur goin to a less dese medium

REMEMBER  DEEP WATER : FAST SHALLOW WATER = SLOW


in this case answer is defntly B


and the wave move straing caz angle of incidence is along the normal..pretend the reflractive surface is a miror
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1526 on: May 25, 2010, 08:24:16 pm »
Quote from: Kimo Jesus on May 25, 2010, 08:21:53 pm
first of all FREQUENCY NEVER CHANGES.


speed adn wavelength only changes whn somethin gets refracted

the speed slows down and wavelength decreases if ur goin to a deneser medium and the opposite happens if ur goin to a less dese medium

REMEMBER  DEEP WATER : FAST SHALLOW WATER = SLOW


in this case answer is defntly B


and the wave move straing caz angle of incidence is along the normal..pretend the reflractive surface is a miror

An explanation to why frequency is the same:  do colour of the waves change when going from deep to shallow water and back?  Think!
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Offline The Golden Girl =D

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1527 on: May 25, 2010, 08:25:03 pm »
Quote from: A@di on May 25, 2010, 08:20:36 pm

B - sound wave longitudinal wave..Longitudinal waves are waves that have the same direction of vibration along their direction of travel

still didn't get it  :-[ ???
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1528 on: May 25, 2010, 08:25:32 pm »
Guys, this is really confusing for me:  describe and explain the function of a 'split ring' commutator in an electric motor.
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1529 on: May 25, 2010, 08:26:49 pm »
Quote from: the golden girl on May 25, 2010, 08:25:03 pm
still didn't get it  :-[ ???

The vibrations of particles are to and fro are parallel to wave direction.  The vibrations of particles are up and down perpendicular to wave direction.  Get it?
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