Find force on charge.

  • Thread starter Ember Cult
  • Start date
  • #1

Homework Statement


Find Force at 1uC charge
https://i.gyazo.com/12891ce5b3adc422acc64daa6e8d3f25.png
12891ce5b3adc422acc64daa6e8d3f25.png


Homework Equations


p?image=https%3A%2F%2Fupload.wikimedia.org%2Fmath%2F3%2Ff%2F6%2F3f67479eda67aa1df0b2b44ca10a116d.png



The Attempt at a Solution


Assume 1uC charge is at point P 2*10^-8C is at A and 10^-8C is at B
FP = FPA + FPB

FPA = K*2*0.01*1/100
= 0.0002*K
= 2k* 10 ^-4

FPA = K*0.01*1/25
= 0.00004*K
= 4K x 10^-4

Now adding them using vector addition,
sqrt((4K*10^-4)^2 + (2K*10^-4)^2 + 0) --(cos(90) will be 0)
sqrt((20K*10^-16)
 

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Answers and Replies

  • #2
haruspex
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Your handling of the powers of ten looks off (or you are using nonstandard units for force).
What's 10-6x10-8?
Later, what's (4k10-4)2?
 

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