54 0 A positron (charge +e,mass equal to the electron mass) ismoving at 1.0 x 107 m/s in the posi- V.tive direction of an x axis when, atV (V)x = 0, it encounters an electric fielddirected along thex axis. The electricpotential V associated with the fieldis given in Fig. 24-57. The scale of the 0vertical axis is set by V, 500.0 V.(a) Does the positron emerge fromthe field at x = 0 (which means its motion is reversed) or at x = 0.50m (which means its motion is not reversed)? (b) What is its speedwhen it emerges?x (cm)2050Figure 24-57 Problem 54.

Answered: Image /qna-images/answer/b778d17f-3b1c-41bd-a074-0f68b6e5c83a.jpg

Answered: 54 0 A positron (charge +e, mass equal…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter19: Electric Forces And Electric Fields

Section: Chapter Questions

Problem 31P

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Consider n equal positively charged particles each of magnitude Q/n placed symmetrically around a circle of radius a. (a) Calculate the magnitude of the electric field at a point a distance x from the center of the circle and on the line passing through the center and perpendicular to the plane of the circle. (b) Explain why this result is identical to the result of the calculation done in Example 23.8.
A proton is fired from very far away directly at a fixed particle with charge q = 1.28 1018 C. If the initial speed of the proton is 2.4 105 m/s, what is its distance of closest approach to the fixed particle? The mass of a proton is 1.67 1027 kg.
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