Physics for Scientists and Engineers: Foundations and Connections
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781337026345
Author: Katz
Publisher: Cengage
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Chapter 24, Problem 51PQ

Figure P24.51 shows four small charged spheres arranged at the corners of a square with side d = 25.0 cm.

a. What is the electric field at the location of the sphere with charge +2.00 nC?

b. What is the total electric force exerted on the sphere with charge +2.00 nC by the other three spheres?

Chapter 24, Problem 51PQ, Figure P24.51 shows four small charged spheres arranged at the corners of a square with side d =

FIGURE P24.51

(a)

Expert Solution
Check Mark
To determine

The electric field at the location of the sphere with charge +2.00nC.

Answer to Problem 51PQ

The electric field at the location of the sphere with charge +2.00nC is (347i^635j^)N/C.

Explanation of Solution

Sketch the diagram showing the electric fields and position vectors of the charges.

Physics for Scientists and Engineers: Foundations and Connections, Chapter 24, Problem 51PQ

Write the equation for the electric field of a charged particle.

E=kqr2r^ (I)

Here, EE is the electric field of a charged particle, k is the Coulomb’s constant, r is the distance and r^ is the surface unit vector in the direction for r.

Use equation (I) to find the equation for the sum of the electric field at the location of the sphere with charge +2.00nC.

E=kq1r12r^1+kq3r32r^3+kq4r42r^4 (II)

Here, q1 is the is the first charge, q4 is the is the third charge, q3 is the is the third charge, r1 is the distance of the first charge to the +2.00nC charge, r3 is the distance of the third charge to the +2.00nC charge, r4 is the distance of the fourth charge to the +2.00nC charge, r^1 is the unit vector in the direction of r1, r^3 is the unit vector in the direction of r3 and r^4 is the unit vector in the direction of r4.

Conclusion:

Substitute 8.99×109Nm2/C2 for k, 1.00nC for q1, 4.00nC for q3 and 3.00nC for q4, d for r1, 2d for r3, d for r4, i^ for r^1, (cos45.0i^+sin45.0j^) for r^3 and j^ for r^4 in equation (II) to find E.

E=k[1.00nCd2i^4.00nC(2d)2(cos45.0i^+sin45.0j^)3.00nCd2j^]=k[(1.00nC)(109C1nC)d2i^(4.00nC)(109C1nC)(2d)2(cos45.0i^+sin45.0j^)(3.00nC)(109C1nC)d2j^]=8.99×109Nm2/C2((25.0cm)(102m1cm))2(109C)[(12cos45.0°)i^+j^]=(347i^635j^)N/C

Thus, the electric field at the location of the sphere with charge +2.00nC is (347i^635j^)N/C.

(b)

Expert Solution
Check Mark
To determine

The total electric forceon the sphere with charge +2.00nC.

Answer to Problem 51PQ

The total electric force on the sphere with charge +2.00nC is (6.94×107i^1.27×106j^)N

Explanation of Solution

Write the equation for the electric force.

F=qE (III)

Here, F is the electric force.

Conclusion:

Substitute 2.00nC for q and (347i^635j^)N/C for E in equation (III) to find F.

F=(2.00nC)((347i^635j^)N/C)=((2.00nC)(109C1nC))((347i^635j^)N/C)=(6.94×107i^1.27×106j^)N

Thus, the total electric force on the sphere with charge +2.00nC is (6.94×107i^1.27×106j^)N.

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Chapter 24 Solutions

Physics for Scientists and Engineers: Foundations and Connections

Ch. 24 - A sphere with a charge of 3.50 nC and a radius of...Ch. 24 - Is it possible for a conducting sphere of radius...Ch. 24 - Prob. 7PQCh. 24 - For each sketch of electric field lines in Figure...Ch. 24 - Prob. 9PQCh. 24 - Two large neutral metal plates, fitted tightly...Ch. 24 - Given the two charged particles shown in Figure...Ch. 24 - Prob. 12PQCh. 24 - Prob. 13PQCh. 24 - A particle with charge q on the negative x axis...Ch. 24 - Prob. 15PQCh. 24 - Figure P24.16 shows three charged particles...Ch. 24 - Figure P24.17 shows a dipole. If the positive...Ch. 24 - Find an expression for the electric field at point...Ch. 24 - Figure P24.17 shows a dipole (not drawn to scale)....Ch. 24 - Figure P24.20 shows three charged spheres arranged...Ch. 24 - Often we have distributions of charge for which...Ch. 24 - Prob. 22PQCh. 24 - A positively charged rod with linear charge...Ch. 24 - A positively charged rod of length L = 0.250 m...Ch. 24 - Prob. 25PQCh. 24 - Prob. 26PQCh. 24 - A Find an expression for the position y (along the...Ch. 24 - The electric field at a point on the perpendicular...Ch. 24 - Prob. 29PQCh. 24 - Find an expression for the magnitude of the...Ch. 24 - What is the electric field at point A in Figure...Ch. 24 - A charged rod is curved so that it is part of a...Ch. 24 - If the curved rod in Figure P24.32 has a uniformly...Ch. 24 - aA plastic rod of length = 24.0 cm is uniformly...Ch. 24 - A positively charged disk of radius R = 0.0366 m...Ch. 24 - A positively charged disk of radius R and total...Ch. 24 - A uniformly charged conducting rod of length =...Ch. 24 - Prob. 38PQCh. 24 - Prob. 39PQCh. 24 - Prob. 40PQCh. 24 - Prob. 41PQCh. 24 - Prob. 42PQCh. 24 - What are the magnitude and direction of a uniform...Ch. 24 - An electron is in a uniform upward-pointing...Ch. 24 - Prob. 45PQCh. 24 - Prob. 46PQCh. 24 - A very large disk lies horizontally and has...Ch. 24 - An electron is released from rest in a uniform...Ch. 24 - In Figure P24.49, a charged particle of mass m =...Ch. 24 - Three charged spheres are suspended by...Ch. 24 - Figure P24.51 shows four small charged spheres...Ch. 24 - Prob. 52PQCh. 24 - A uniform electric field given by...Ch. 24 - A uniformly charged ring of radius R = 25.0 cm...Ch. 24 - Prob. 55PQCh. 24 - Prob. 56PQCh. 24 - A potassium chloride molecule (KCl) has a dipole...Ch. 24 - Prob. 58PQCh. 24 - Prob. 59PQCh. 24 - Prob. 60PQCh. 24 - A total charge Q is distributed uniformly on a...Ch. 24 - A simple pendulum has a small sphere at its end...Ch. 24 - A thin, semicircular wire of radius R is uniformly...Ch. 24 - Prob. 64PQCh. 24 - Prob. 65PQCh. 24 - Prob. 66PQCh. 24 - Prob. 67PQCh. 24 - Prob. 68PQCh. 24 - A thin wire with linear charge density =0y0(14+1y)...Ch. 24 - Prob. 70PQCh. 24 - Two positively charged spheres are shown in Figure...Ch. 24 - Prob. 72PQCh. 24 - Prob. 73PQCh. 24 - Prob. 74PQCh. 24 - A conducting rod carrying a total charge of +9.00...Ch. 24 - Prob. 76PQCh. 24 - A When we find the electric field due to a...Ch. 24 - Prob. 78PQCh. 24 - Prob. 79PQCh. 24 - Prob. 80PQCh. 24 - Prob. 81PQCh. 24 - Prob. 82PQ
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