Two Tiny Beads, Each of Mass $3.2 \mathrm {~g}$ , Carry Equal-Magnitude Charges

question 44

Multiple Choice

Two tiny beads, each of mass $3.2 \mathrm {~g}$ , carry equal-magnitude charges. When they are placed $6.4 \mathrm {~cm}$ apart and released in outer space, they begin to accelerate toward each other at $538 \mathrm {~m} / \mathrm { s } ^ { 2 }$ . What is the magnitude of the charge on each bead? $\left( k = 1 / 4 \pi \varepsilon _ { 0 } = 9.0 \times 10 ^ { 9 } \mathrm {~N} \cdot \mathrm { m } ^ { 2 } / \mathrm { C } ^ { 2 } \right.$ )

• A) \(1800 \mathrm { nC }\)
• B) \(890 \mathrm { nC }\)
• C) \(44 \mathrm { nC }\)
• D) \(1300 \mathrm { nC }\)
• E) \(510 \mathrm { nC }\)

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