What is the electric field e5 at the origin in fig. 21 9 62 due to the two charges at a and b? (b) Repeat, but let the charge at b be reversed in sign.
1. Calculate the electric field at the origin due to the two charges at a and b in fig. 21 9 62.
2. Determine the electric field e5 at the origin in fig. 21 9 62 caused by the two charges at a and b.
3. Find the electric field at the origin in fig. 21 9 62 due to the charges at a and b, then repeat for the reversed sign at b.
4. Calculate the electric field e5 at the origin in fig. 21 9 62 when the charge at b is reversed in sign.