A proton and an electron are fixed in space with a separation of $945 \mathrm{~nm}$. Calculate the electric potential at the midpoint between the two particles. potential: 0 Find the magnitude of the electric field at the same point. magnitude of field: $1.56 \times 10^{4}$ Incorrect The direction of field is toward the proton. toward the electron. another direction. undetermined.

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