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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 225509 times)

holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2025 on: May 26, 2010, 04:20:51 pm »
Quote from: ang3l on May 26, 2010, 04:20:23 pm
Q: Describe how the energy from the sun becomes stored energy in water behind a dam.[3]

Thx

Look at the MS.

Seriously.  ;)
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Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2026 on: May 26, 2010, 04:22:32 pm »
Quote from: Kimo Jesus on May 26, 2010, 04:11:19 pm
AAADII..EHM ( i need u to imagine over here )

look if there is a ciruit with a resisor in series and after the resistor comes two PARALEL resistors .

Is it true that if the series resistor has a higher resistance that both the parallel , the current goes thro sreies resitor first?


because the voltge has to be used up in teh series resistor so that we could calculate the voltage around the parallel ones?

LMAO !! XD .. a resisor in series ??
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Offline MasterMath

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2027 on: May 26, 2010, 04:22:56 pm »
Quote from: ang3l on May 26, 2010, 04:20:23 pm
Q: Describe how the energy from the sun becomes stored energy in water behind a dam.[3]

Thx
Energy from the sun (moved to earth by radiation) increases the temperature of water .. Thus making it evaporate to gas which increases its G.P.E then the vapor falls as rain which can be used in dams to move turbines etc.
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2028 on: May 26, 2010, 04:26:05 pm »
Quote from: ~VIN1094~ on May 26, 2010, 04:22:32 pm
LMAO !! XD .. a resisor in series ??
I guess..this is wat it means maybe ?
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Offline WARRIOR

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2029 on: May 26, 2010, 04:26:50 pm »
look. ( spaces are resistors )

In order to find the voltages accros the parallel resistors. u have to subtbract the voltage being used up  in the series and the voltage is then given to teh 2 parallel resistors

well what if the resistance of the series resistor is higher than total resistance of parallel ristors?

does the current flow thro the parallel first then?
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Offline thenewkid™

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2030 on: May 26, 2010, 04:30:45 pm »
Quote from: MasterMath on May 26, 2010, 04:22:56 pm
Energy from the sun (moved to earth by radiation) increases the temperature of water .. Thus making it evaporate to gas which increases its G.P.E then the vapor falls as rain which can be used in dams to move turbines etc.
r u sure???
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2031 on: May 26, 2010, 04:32:36 pm »
Quote from: Kimo Jesus on May 26, 2010, 04:26:50 pm
look. ( spaces are resistors )

In order to find the voltages accros the parallel resistors. u have to subtbract the voltage being used up  in the series and the voltage is then given to teh 2 parallel resistors

well what if the resistance of the series resistor is higher than total resistance of parallel ristors?

does the current flow thro the parallel first then?

ok suppose V = 10V

Series Resistor = 3ohms

Each parallel Resistor = 2ohms

thus, combined parallel resistance = 1 ohm.

so the parallel resistors get , 1/4*10 = 2.5Volts and the series resistor gets = 7.5Volts
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Offline Adzel

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2032 on: May 26, 2010, 04:34:36 pm »
Quote from: M'i'D'o on May 26, 2010, 03:49:39 pm
hey everybody there is a question in paper 1 physics i was solving yesterday while studying...
a steel bar is hanged near an electromagnet....
A ( attract  attract )
B ( attract  repel   )
C  ( repel attract )
D ( repel repel )

Guys....don't you think that this question is familiar....
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2033 on: May 26, 2010, 04:35:26 pm »
Quote from: Adzel on May 26, 2010, 04:34:36 pm
Guys....don't you think that this question is familiar....

To what?  Can someone confirm whether the answer to that question is B?
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Offline Adzel

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2034 on: May 26, 2010, 04:37:54 pm »
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2035 on: May 26, 2010, 04:39:21 pm »
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Offline thenewkid™

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2036 on: May 26, 2010, 04:39:40 pm »
Quote from: Adzel on May 26, 2010, 04:34:36 pm
Guys....don't you think that this question is familiar....

somthin i ws doing some hrs ago
right
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2037 on: May 26, 2010, 04:40:36 pm »
Quote from: M'i'D'o on May 26, 2010, 03:49:39 pm
hey everybody there is a question in paper 1 physics i was solving yesterday while studying...
a steel bar is hanged near an electromagnet....
A ( attract  attract )
B ( attract  repel   )
C  ( repel attract )
D ( repel repel )

So is the answer B?
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Offline WARRIOR

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2038 on: May 26, 2010, 04:40:59 pm »
Quote from: A@di on May 26, 2010, 04:32:36 pm
ok suppose V = 10V

Series Resistor = 3ohms

Each parallel Resistor = 2ohms

thus, combined parallel resistance = 1 ohm.

so the parallel resistors get , 1/4*10 = 2.5Volts and the series resistor gets = 7.5Volts
i seee
i had this weird thing in my mind...hmmm
cool thx
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Offline MasterMath

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2039 on: May 26, 2010, 04:42:14 pm »
lol @ everyones silence.. no1 wants to really say where they remember this from although im sure everyone of you where that question was :D
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