please explain

PHYS2016 18.6.WA.058. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Consider the following. 0.500 mm 60,0 (a) Red blood cells often become charged and can be treated as point charges. Healthy red blood cells are negatively charged, but unhealthy rolls (due to the presence of a bacteria, for example) can become positively charged. In the figure, three red blood cells are oriented such that they are located on the corners of an equilateral triangle. The red blood cell charges are A - 1:60 pC, B - 7.50 p6, and C - -4./0 pC. Given these charges, what would the magnitude and direction of the electric field be at cell A? (Up , 1x 10 650 ning magnitude What is the equation for theielect is field ofa point charge? How do you calculate the net electric field at a certain location? What are the components of the fields due to B and Cat A's location? N/C direction What are the components of the fellelectic field? can you then use these to find the direction?" counterclockwise from the +x-axis (b) If the charge of cell A were doubled, how would the electric field at cell A than