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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

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