Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Weaam:
--- Quote from: Shazizzzle on May 26, 2010, 09:15:01 pm ---The electromotive force of any battery is the amount of energy in joules provided to each coloumb (C) of charge, as it passes through the circuit.
So, the electromotive force of 12 V would mean,
the battery provides 12 J of energy to each coloumb (C) of charge as it passes through the circuit.
--- End quote ---
Thaaaaanks ssoo muuch!
That was great help! ;)
Weaam:
--- Quote from: Helium on May 26, 2010, 09:17:50 pm ---A cell (or battery) pushes electrons round a circuit.
It is a kind of electron pump.Different cells can exert different electrical pressures.
This electrical pressure is called electromotive force or e.m.f and it is measured in volts(V).
Extracted From (Physics for you).
;)
hope u understand
--- End quote ---
Its not reaally clear, but i kinda got it, thanks anyway! ;D
Shazizzzle:
Okay, a few more things.
When experimenting latent heat of fusion, the mass taken into consideration is the mass of the MELTED ICE i.e THE WATER FORMED, right?
And, when experimenting latent heat of vaporisation, the mass taken into consideration is the MASS OF THE STEAM FORMED, in other words, (final mass of beaker + water after experiment) - (initial mass of beaker + water before experiment), right? ???
red_911:
hey can anyone explain me question 9(C) (2) ? ??? 0625/31/M/J/08
blackberry:
PLZZZZZ HELP!!!!!!!!!!!!!!
how can we reduce power loss in relation to resistance?? decrease or increase?
and wat r de methods for changing resistance in relation to length,thickness,area,temp etc of wire?
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