Question

Deduce the electric field strenght at a point midway between charges of 7.2*10^-6 C and -3.4*10^-6 C that are 2.0m apart from air.

Thank you!

Answer 1

Calculate E from each, then add. Now in between, both will point the same direction, so add the absolute values.

E=kq/distance^2

Answer 2

For the 7.2*10-6C I get 16200 and for -3.4*10^-6 I get -7650. Because one value is positive and the other is negative, does this mean I need to add these values together (including the minus) or take away?

Answer 3

Reread what I said. Which way does each point? Goodness.

Answer 4

Thank you bobpursley!
Sorry about the question before, I didn't know what an absolute value was- but I checked it on wikipedia

Answer 5

8550