2. A charge of +5.8 x 10-7 C and mass 3.9 x 10-17 kg enters a uniform electric field between parallel plates with voltage 2.21 x 10-7 V (Negative on top, positive on bottom). The distance between the plates is 2.8cm. If the charge enters through the middle of the parallel plates moves horizontally at a speed of 2.1 x 10² m/s, what is its velocity when it hits the – plate? Draw the diagram.

2. A charge of +5.8 x 10-7 C and mass 3.9 x 10-17 kg enters a uniform electric field between parallel plates with voltage 2.21 x 10-7 V (Negative on top, positive on bottom). The distance between the plates is 2.8cm. If the charge enters through the middle of the parallel plates moves horizontally at a speed of 2.1 x 10² m/s, what is its velocity when it hits the – plate? Draw the diagram.

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

Chapter20: Electric Potential And Capacitance

Section: Chapter Questions

Problem 54P: A parallel-plate capacitor has a charge Q and plates of area A. What force acts on one plate to...

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A parallel-plate capacitor has a charge Q and plates of area A. What force acts on one plate to attract it toward the other plate? Because the electric field between the plates is E = Q/A0, you might think the force is F = QE = Q2/A0. This conclusion is wrong because the field E includes contributions from both plates, and the field created by the positive plate cannot exert any force on the positive plate. Show that the force exerted on each plate is actually F = Q2/2A0. Suggestion: Let C = 0A/x for an arbitrary plate separation x and note that the work done in separating the two charged plates is W=Fdx.
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