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Two negative charges, each with a charge of -7.7 nC, are at fixed locations as shown below.
A proton is launched from the midpoint of the line joining the charges in a direction
perpendicular to the line joining the charges. Find the minimum initial velocity of the proton
that will allow it to escape to infinity. Ignore gravitational or any other influences on the
proton.
(k=1/480 = 8.99 × 109 Nm²/C2, e = 1.60 × 10-19 C, mproton = 1.67× 10-27 kg). [Hint:
Conservation of energy might be helpful and you can assume that the proton is at rest at
infinity]
5.0 mm
5.0 mm
V
8.9 × 106 m/s
1.8 × 107 m/s
None of these
4.6 × 106 m/s
2.3 × 106 m/s
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Transcribed Image Text:Two negative charges, each with a charge of -7.7 nC, are at fixed locations as shown below. A proton is launched from the midpoint of the line joining the charges in a direction perpendicular to the line joining the charges. Find the minimum initial velocity of the proton that will allow it to escape to infinity. Ignore gravitational or any other influences on the proton. (k=1/480 = 8.99 × 109 Nm²/C2, e = 1.60 × 10-19 C, mproton = 1.67× 10-27 kg). [Hint: Conservation of energy might be helpful and you can assume that the proton is at rest at infinity] 5.0 mm 5.0 mm V 8.9 × 106 m/s 1.8 × 107 m/s None of these 4.6 × 106 m/s 2.3 × 106 m/s
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