Qualification > Sciences
Edexcel PHYSICS Doubts
xainer:
--- Quote from: xainer on August 28, 2012, 03:31:00 pm ---thanks! but why does longer distance decrease the value of F?
--- End quote ---
is it because force is inversely proportional to the distance according to the equation??
what's the concept behind it?
astarmathsandphysics:
Force is inversely proportional to distance because force times distance equalsenergy which is constant
xainer:
Oh! Thanks a lot :)
astarmathsandphysics:
Suggest you read my post above again. V bad English.
jenifer911:
Hi everyone,
Could any one solve the following problem for me??? it can be found on the edexcel a2 physics book p.41 Questions 4.
4. In the electron beam of a CRO, electrons are accelerated through a potential difference of 3000V which is set up between electrodes 3cm apart.
a)Calculate the electric field strength, assuming it is a uniform field
b) How fast will the electrons be moving when htey emerge from this field?
Im having problems with (b), the answer 1.62 x 10^7 m s-1 while my calculations are double it i.e. 3.25X10^7ms-1
Thx in advance!!
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