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ALL PHYSICS DOUBTS - POST HERE !!

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Syed Kazim:

--- Quote from: blackberry on May 26, 2010, 10:00:10 pm ---like increasing the length of the wire increases resistance so what does increasin thickness of wire do?

--- End quote ---

An increase in the length of a wire will decrease increase the resistance.
An increase in the diameter of a wire will decrease the resistance.

Malak:

--- Quote from: Baladya on May 26, 2010, 09:54:25 pm ---http://www.freeexampapers.us/IGCSE/Physics/CIE/2009%20Nov/0625_w09_qp_31.pdf
Can u plzz help, m totally stuck at this question and need to understand it fully cuz if i dont then m *** up tommorow :S

10)c)d)e)
first at C) how can we get Energy when we dont have time?
Then i get confused by the repeating stuff in the other questions

plz explain in a simple way cuz  m confused :S

Thankssss :)

--- End quote ---

For c use this formula p=I^2 * r

d) The simple voltage formula that is V= IR
You jst hav to calculate the voltage drop by the resistor

e) There r 2 resistor so for one resistor the voltage drop is 7.5...Multiply by it 2 and subtract from the 22000

Baladya:

--- Quote from: Baladya on May 26, 2010, 09:54:25 pm ---http://www.freeexampapers.us/IGCSE/Physics/CIE/2009%20Nov/0625_w09_qp_31.pdf
Can u plzz help, m totally stuck at this question and need to understand it fully cuz if i dont then m *** up tommorow :S

10)c)d)e)
first at C) how can we get Energy when we dont have time?
Then i get confused by the repeating stuff in the other questions

plz explain in a simple way cuz  m confused :S

Thankssss :)

--- End quote ---

cmon plzzz help   ::)

Baladya:

--- Quote from: ang3l on May 26, 2010, 10:03:24 pm ---For c use this formula p=I^2 * r

--- End quote ---

ya okay, but thats for power, but they said energy??

blackberry:
thanks syed, baladya and diva!!!!!!!!

i kan sleep in peace noww!!!

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