Concept explainers
An electric dipole is located along the y axis as shown in Figure P24.48. The magnitude of its electric dipole moment is defined as p = 2aq. (a) At a point P, which is far from the dipole (r ≫ a), show that the electric potential is
(b) Calculate the radial component Er and the perpendicular component Eθ of the associated electric field. Note that Eθ = −(1/r)(∂V/∂θ). Do these results seem reasonable for (c) θ = 90° and 0°? (d) For r = 0? (e) For the dipole arrangement shown in Figure P24.48, express V in terms of Cartesian coordinates using r = (x2 + y2)1/2 and
(f) Using these results and again taking r ≫ a, calculate the field components Ex and Ey.
Figure P24.48
(a)
To show: The electric potential at a point P is
Answer to Problem 48CP
The charge on the insulating sphere is
Explanation of Solution
Given info: The magnitude of the electric dipole moment is
The expression to calculate the total electric potential of the dipole is,
Since,
Substitute
Substitute
Conclusion:
Therefore, the electric potential at a point P is
(b)
The radial component
Answer to Problem 48CP
The radial component is
Explanation of Solution
Given info: The magnitude of the electric dipole moment is
Write the expression of radial component
Substitute
Write the expression to calculate the and perpendicular component
Substitute
Thus, the radial component is
Conclusion:
Therefore, radial component is
(c)
Whether the values of
Answer to Problem 48CP
These values of radial component and perpendicular component of electric field seem reasonable.
Explanation of Solution
Given info: The magnitude of the electric dipole moment is
The radial component of electric filed at point P is,
Substitute
Substitute
The perpendicular component of electric field at point P is,
Substitute
Substitute
Thus, these values of radial component and perpendicular component of electric field seem reasonable.
Conclusion:
Therefore, these values of radial component and perpendicular component of electric field seem reasonable.
(d)
Whether the values of
Answer to Problem 48CP
The value of radial component and perpendicular component of electric field at
Explanation of Solution
Given info: The magnitude of the electric dipole moment is
The magnitude of the electric field between the charges of the dipole is not infinite.
The radial component of electric filed at point P is,
The perpendicular component of electric field at point P is,
The values of
Conclusion:
Therefore, the value of radial component and perpendicular component of electric field at
(e)
The electric potential of dipole in terms of Cartesian coordinates.
Answer to Problem 48CP
The electric potential of dipole in terms of Cartesian coordinates is
Explanation of Solution
Given info: The magnitude of the electric dipole moment is
The electric potential at a point P is,
If
Substitute
Conclusion:
Therefore, the electric potential of dipole in terms of Cartesian coordinates is
(e)
The field component
Answer to Problem 48CP
The field component
Explanation of Solution
Given info: The magnitude of the electric dipole moment is
The x component of the electric field is,
Substitute
The y component of the electric field is,
Substitute
Conclusion:
Therefore, the field component
Want to see more full solutions like this?
Chapter 24 Solutions
Physics for Scientists and Engineers with Modern Physics
Additional Science Textbook Solutions
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
Fundamentals Of Thermodynamics
Fundamentals of Physics Extended
Chemistry: The Central Science (14th Edition)
Principles of Anatomy and Physiology
Biochemistry: Concepts and Connections (2nd Edition)
- help because i am so lost and it should look something like the picturearrow_forward3.31 A Ferris wheel with radius Figure E3.31 14.0 m is turning about a horizontal axis through its center (Fig. E3.31). The linear speed of a passenger on the rim is constant and equal to 6.00 m/s. What are the magnitude and direction of the passenger's acceleration as she passes through (a) the lowest point in her circular motion and (b) the high- est point in her circular motion? (c) How much time does it take the Ferris wheel to make one revolution?arrow_forward1.56 ⚫. Three horizontal ropes pull on a large stone stuck in the ground, producing the vector forces A, B, and C shown in Fig. P1.56. Find the magnitude and direction of a fourth force on the stone that will make the vector sum of the four forces zero. Figure P1.56 B(80.0 N) 30.0 A (100.0 N) 53.0° C (40.0 N) 30.0°arrow_forward
- 1.39 Given two vectors A = -2.00 +3.00 +4.00 and B=3.00 +1.00 -3.00k. (a) find the magnitude of each vector; (b) use unit vectors to write an expression for the vector difference A - B; and (c) find the magnitude of the vector difference A - B. Is this the same as the magnitude of B - Ä? Explain.arrow_forward5. The radius of a circle is 5.5 cm. (a) What is the circumference in meters? (b) What is its area in square meters? 6. Using the generic triangle below, solve the following: 0 = 55 and c = 32 m, solve for a and b. a = 250 m and b = 180 m, solve for the angle and c. b=104 cm and c = 65 cm, solve for a and the angle b a 7. Consider the figure below representing the Temperature (T in degrees Celsius) as a function of time t (in seconds) 4 12 20 (a) What is the area under the curve in the figure below? (b) The area under the graph can be calculated using integrals or derivatives? (c) During what interval is the derivative of temperature with respect to time equal to zero?arrow_forwardPart 3: Symbolic Algebra Often problems in science and engineering are done with variables only. Don't let the different letters confuse you. Manipulate them algebraically as though they were numbers. 1. Solve 3x-7= x + 3 for x 2x-1 2. Solve- for x 2+2 In questions 3-11 solve for the required symbol/letter 3. v2 +2a(s-80), a = = 4. B= Ho I 2π r 5. K = kz² 6.xm= MAL ,d= d 7.T, 2 = 8.F=Gm 9. mgh=mv² 10.qV = mu² 80 12. Suppose that the height in meters of a thrown ball after t seconds is given by h =6+4t-t². Complete the square to find the highest point and the time when this happens. 13. Solve by completing the square c₁t² + cat + 3 = 0. 14. Solve for the time t in the following expression = 0 + vot+at²arrow_forward
- A blacksmith cools a 1.60 kg chunk of iron, initially at a temperature of 650.0° C, by trickling 30.0°C water over it. All the water boils away, and the iron ends up at a temperature of 120.0° C. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Changes in both temperature and phase. Part A How much water did the blacksmith trickle over the iron? Express your answer with the appropriate units. HÅ mwater = Value 0 ? Units Submit Request Answerarrow_forwardSteel train rails are laid in 13.0-m-long segments placed end to end. The rails are laid on a winter day when their temperature is -6.0° C. Part A How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 32.0°C? Express your answer with the appropriate units. ☐ о μΑ ? D = Value Units Submit Previous Answers Request Answer × Incorrect; Try Again; 3 attempts remaining Al Study Tools Looking for some guidance? Let's work through a few related practice questions before you go back to the real thing. This won't impact your score, so stop at anytime and ask for clarification whenever you need it. Ready to give it a try? Start Part B If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is 32.0°C? Express your answer in pascals. Enter positive value if the stress is tensile and negative value if the stress is compressive. F A Ο ΑΣΦ ? Раarrow_forwardhelp me with this and the step I am so confused. It should look something like the figure i shownarrow_forward
- Part A In an effort to stay awake for an all-night study session, a student makes a cup of coffee by first placing a 200 W electric immersion heater in 0.250 kg of water. How much heat must be added to the water to raise its temperature from 20.5° C to 95.0°C? Express your answer in joules. ΕΠΙ ΑΣΦ Q Submit Request Answer Part B ? J How much time is required? Assume that all of the heater's power goes into heating the water. Express your answer in seconds. VG ΑΣΦ ? t = Sarrow_forwardhelp i dont understand this it should look like something like this picture. help me with the stepsarrow_forwardDraw the velocity vectors starting at the black dots and the acceleration vectors including those equal to zero.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning