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Chapter 25: Q. 7 (page 709)

What is the electric potential energy of the group of charges in

FIGURE EX25.7?

Short Answer

Expert verified

The platform's restoring force is-4.7脳10-6.

Step by step solution

01

Definition

Given information:

Charges are -4.0nc,role="math" localid="1649589851700" 3.0nc,3.0nc.

Distance between two charges -4.0ncand3.0ncis 4.0cmandrole="math" localid="1649589934406" 3.0cm.

Find:

The objective is to find electric potential energy of the group of charges.

The total amount of energy liberated by a cohesive block charge if it is positioned at any location is through as voltage .

02

Evaluating Potential Energy

q1=鈭�4.0nCq2=3.0nCq3=3.0nCd12=3.0cmd13=4.0cm

This can be used to illustrate the Euclidean theorem.

d23=d122+d132=5cm

03

:  Mechanical  Energy of  pair

The potential maximum electricity is summation of the energy aspirations within each pair..U=14蟺蔚0q1q2d12+q1q3d13+q2q3d23

Get on th data values

localid="1649412765806" U=-4.7脳10-6J

04

Diagramtic Explantion

-4.7脳106J

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Most popular questions from this chapter

aCharge q1is distance rfrom a positive point charge Q. Charge q2=q13is distance2r from Q. What is the ratio U1U2of their potential energies due to their interactions with Q ?
bChargeq1 is distances from the negative plate of a parallel-plate capacitor. Chargeq2=q13 is distance 2sfrom the negative plate. What is the ratioU1U2 of their potential energies?

A proton and an alpha particle(q=+2e,m=4u)are fired directly toward each other from far away, each with an initial speed of 0.010c. What is their distance of closest approach, as measured between their centers?

x=-1.0cmA-2.0nCcharge and a +2.0nCcharge are located on the x-axis at and x=+1.0cm, respectively.

a. Other than at infinity, is there a position or positions on the x-axis where the electric field is zero? If so, where?

b. Other than at infinity, at what position or positions on the x-axis is the electric potential zero?

c. Sketch graphs of the electric field strength and the electric potential along the x-axis.

In FIGURE EX25.26, a proton is fired with a speed of 200,000 m/s from the midpoint of the capacitor toward the positive plate.

a. Show that this is insufficient speed to reach the positive plate.

b. What is the proton鈥檚 speed as it collides with the negative plate?

FIGURE P25.66 shows two uniformly charged spheres.

What is the potential difference between pointsaandb?

Which point is at the higher potential?
See all solutions

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