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Get Full Access to University Physics - 13 Edition - Chapter 21 - Problem 61e
Get Full Access to University Physics - 13 Edition - Chapter 21 - Problem 61e

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# Three charges are at the corners of an isosceles tri-angle ISBN: 9780321675460 31

## Solution for problem 61E Chapter 21

University Physics | 13th Edition

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Problem 61E

Three charges are at the corners of an isosceles tri-angle as shown in Fig. E21.57. The charges form a dipole. (a) Find the force (magnitude and direction) the - 10.00-µC charge exerts on the dipole. (b) For an axis perpendicular to the line connecting the charges at the mid-point of this line, find the torque (magnitude and direction) exerted on the dipole by the - 10.00-µC charge.

Step-by-Step Solution:

Solution 61E Introduction We have to calculate the force and torque on the dielectric by the 10 C charge. Step 1: Above figure represents the force on each charge of the dipole. The magnitude of the force on each charge will be same as the distance between the charges and the magnitude of the charges are same. But as shown in the figure one force will be attractive and other will repulsive. The direction of the forces are shown in the figure. The magnitude of the force is |1 |2q | |F 1 = |F 2 = |F| = k r2 Here k = 1 = 8.99 × 10 Nm C 2 2 40 2 6 We also have r = 2.00 cm = 2.00 × 10 cm, |q | 1 5.00 C = 5.00 × 10 C , and 6 |q2| = 10 × 10 C , Hence the magnitude of the force is 6 6 |F| = (8.99 × 10 Nm C ) 2 2 (5.00×10 C)(2×12 C) = 1.124 × 10 N3 (2.00×10 m) Now the x and y component of the force is given by |F x = |F 1x= |F |2x F cos And |F | = |F | = |F | = F sin y 1y 2y Now we have (3.00 cm)/2 sin = 2.00 cm = 0.75 cos = 1 in = 0.66 Hence the x component is |F x = |F 1x= |F |2x (1.124 N)(0.66) = 742 N and |F y = |F 1y= |F | 2y(1.124 N)(0.75) = 843 N From the figure we can see that the x components are opposite to each other, hence the total x component will be zero. But the y components are parallel hence the total component will be 3 |Fyt = 2|F y = 2(843 N) = 1.69 × 10 N 3 Hence the total force on the dipole is 1.69 × 10 N and it is downward.

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##### ISBN: 9780321675460

The full step-by-step solution to problem: 61E from chapter: 21 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. This full solution covers the following key subjects: dipole, Charges, Charge, magnitude, line. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. The answer to “Three charges are at the corners of an isosceles tri-angle as shown in Fig. E21.57. The charges form a dipole. (a) Find the force (magnitude and direction) the - 10.00-µC charge exerts on the dipole. (b) For an axis perpendicular to the line connecting the charges at the mid-point of this line, find the torque (magnitude and direction) exerted on the dipole by the - 10.00-µC charge.” is broken down into a number of easy to follow steps, and 67 words. University Physics was written by and is associated to the ISBN: 9780321675460. This textbook survival guide was created for the textbook: University Physics, edition: 13. Since the solution to 61E from 21 chapter was answered, more than 332 students have viewed the full step-by-step answer.

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