12.4. Fields Due to Several Charges http://www.ck12.org
Finding the electric field at Test Charge 2 will involve all of the same steps. First we must determine which charge
Test Charge 2 is closer to. Like Test Charge 1, Test Charge 2 is closer to the 1C charge. However, Test Charge 2
is drastically closer whereas Test Charge 1 was only slightly closer. Therefore, the electric field that Test Charge 2
experiences as a result of the 1C charge will be strong, thus resulting in a longer arrow. The distance between the
− 1 Cand Test Charge 2 is large and therefore the electric field experienced by Test Charge 2 as a result of the− 1 C
charge will be small. The resultant vectors will look something like this.