Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Malak:
--- Quote from: ambitious94 on May 25, 2010, 02:09:57 pm ---I have a new question XD
What are nucleons? Neutrons or all the particles present in the nucleus?
Also
The north pole of a bar magnet is placed next to end P of an iron bar PQ, as shown. As a result,
magnetic poles are induced in the iron bar.
S (magnet) N iron bar-->P Q
What are the magnetic poles induced at P and at Q?
magnetic pole at P magnetic pole at Q
A north north
B north south
C south north
D south south
Answer's C. I dont get it...I thght the N pole induced an N pole....:S
--- End quote ---
No The pole is always opposite to that nearest of the permanent manget...In this case P is near to N of permanent magnet so it S
misterioso:
--- Quote from: Raywin on May 25, 2010, 02:06:17 pm ---The ans is B. This is cause there is a complete circuit between volt meter 1 and the battery when the switch is opened. And the capacitor will be charging when the switch is closed. When the switch is opened again, it will discharge thus volt.meter 3 will show voltage. Thus these two volt. meters will show some voltage. So ans is B. Hope u got me.. :)
--- End quote ---
Wow thanks that explains a lot! I thought that the capacitor was the charge for the whole cicuit thats where i was getting confused!!! Now I know that the battery and capacitor were individual circuits
--- Quote from: ~VIN1094~ on May 25, 2010, 02:16:37 pm ---pics cool ;) i use w7 too ;)
--- End quote ---
Yeah it is isnt it? Its got the sweetness of Vista but the speed of XP. Thanks for all the help, u even made the effort to edit the picture!!!
Malak:
Can anyone exaplain me the relation between volume and pressure...Why when the volume decreases the pressure increases?
Specifically in this question:
Wouldnt the volume remain same ???
MasterMath:
What should i revise for paper 1 ? ive solved like from 2009-->2003 .. my average marks are 38-40 .. do i need to do till 1996 or revise anything?
Thanks
Vin:
--- Quote from: ang3l on May 25, 2010, 02:23:44 pm ---Can anyone exaplain me the relation between volume and pressure...Why when the volume decreases the pressure increases?
Specifically in this question:
Wouldnt the volume remain same ???
--- End quote ---
answer is C ..
Volume is inversely proportional to Pressure .. as pressure increases volume decreases .. or vise versa
k= constant
p = k/V
pV = k
explaining the molecules .. when pressure is applied the molecules come closer hence are 'compressed' so they are reduced in volume
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