Two 10-cm-diameter charged rings face each other, 15 cm apart. The left ring is charged to − 30 nC and the right ring is charged to + 30 nC.
What is the magnitude of the electric field E⃗ at the midpoint between the two rings?
What is the magnitude of the force on a proton at the midpoint?
A)
Electric field, E = k Qx/(x^2 + R^2)^(3/2)
E = (9 x 10^9)(30 x 10^-9 x 0.075)/(0.075^2 + 0.05^2)^1.5
E = 27649.67 N/C
Total field, En = 2E = 55299.34 N/C
B)
Force, F = 1.6 x 10^-19 x 55299.34 = 8.85 x 10^-15 N
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