Question

A proton and an electron in a hydrogen
atom are separated on the average by about
5.3 × 10−11 m.
What is the magnitude and direction of the
electric field set up by the proton at the posi-
tion of the electron? The Coulomb constant
is 8.99 × 109 N · m2/C2.
1. 27.1396 N/C away from the proton
2. 8.19309 × 10−8 N/C away from the pro-
ton
3. 5.12068 × 1011 N/C away from the pro-
ton
4. 8.19309 × 10−8 N/C toward the proton
5. 5.12068 × 1011 N/C toward the proton
6. 27.1396 N/C toward the proton