Question

A negative charge of -2.0 x 10^-4C and a positive charge of 8.0 x 10^-4C are separated by 0.30m. What is the force between the two charges? please can someone help me with this problem

Answer 1

you know coulomb's law right?

Answer 2

yea kind of , not alot

Answer 3

i dont know how to solve this problem tho

Answer 4

but you do know the equation\[\large F=k\frac{q_1q_2}{r^{2}}\]right?

Answer 5

yea i do

Answer 6

so just put q1=2.0 x 10^-4C
q2=8.0 x 10^-4C
r=0.3m
& find F. Note that i've ignored the sign of q1.

Answer 7

do you get it?

Answer 8

so then how do i find f?

Answer 9

@rajathsbhat so what is the answer ?

Answer 10

@rajathsbhat has already answered it.. He gave you the formula and the value of variables used in formula.. Just substitute them in formula!
Use K=9*10^9

Answer 11

okay thank you :)

Answer 12

so the answer wod be 6.6177 ???

Answer 13

wait wat would K be ?

Answer 14

what formula are you using?

Answer 15

the F=k*q1*q2 /r2

Answer 16

bt i dont know wat k is ?

Answer 17

This should help:

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefor.html

Answer 18

thank you so much :)

Answer 19

np :)