COLLEGE PHYSICS:VOL.1
2nd Edition
ISBN: 9780134862897
Author: ETKINA
Publisher: PEARSON
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Textbook Question
Chapter 18, Problem 33CQ
Explain why the excess charge on an electrical
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COLLEGE PHYSICS:VOL.1
Ch. 18 - Review Question 18.1 How do you estimate the...Ch. 18 - Review Question 18.2 You have a point-like object...Ch. 18 - Review Question 18.3 Compare the work needed to...Ch. 18 - Review Question 18.4 Imagine that you have an...Ch. 18 - Review Question 18.5 In this section you read that...Ch. 18 - Review Question 18.6 What are the differences...Ch. 18 - Review Question 18.7 A parallel plate capacitor...Ch. 18 - Review Question 18.8 Why do heart contractions...Ch. 18 - 1 What does the field at point A, which is a...Ch. 18 - Why can you shield an object from an external...
Ch. 18 - If you place a block made of a conducting material...Ch. 18 - 4. If you place a block made of a dielectric...Ch. 18 - 5. Two identical positive charges are located at a...Ch. 18 - An electric dipole is placed between the...Ch. 18 - 7. A positive charge is fixed at some distance d...Ch. 18 - Figure Q18.8 shows E field lines in a region of...Ch. 18 - How do we use the model of the electric field to...Ch. 18 - Describe a procedure to determine the E field at...Ch. 18 - What does it mean if the E field at a certain...Ch. 18 - A very small positive charge is placed at one...Ch. 18 - 13. How do we create an E field with parallel...Ch. 18 - 14. Draw a sketch of the field lines caused by...Ch. 18 - 15. Draw a sketch of the field lines caused by...Ch. 18 - 16. Jim thinks that E field lines are the paths...Ch. 18 - Can E field lines cross? Explain why or why not.Ch. 18 - An electron moving horizontally from left to right...Ch. 18 - 19. (a) What does it mean if the electric...Ch. 18 - 20. Explain how grounding works.
Ch. 18 - 21. Explain how shielding works.
Ch. 18 - 22. Explain the difference between the microscopic...Ch. 18 - Explain why, for charged objects submerged in a...Ch. 18 - 24. What does it mean if the dielectric constant k...Ch. 18 - What is the dielectric constant of a metal?Ch. 18 - Describe the relation between the quantities E...Ch. 18 - If the V field in a region is constant, what is...Ch. 18 - 28. Why are uncharged pieces of a dielectric...Ch. 18 - 29. Draw equipotential surfaces and label them in...Ch. 18 - Show a charge arrangement and a point in space...Ch. 18 - 31. Explain what happens when you place a...Ch. 18 - (a) Explain what happens when you place a...Ch. 18 - 33. Explain why the excess charge on an electrical...Ch. 18 - Draw a microscopic representation of the charge...Ch. 18 - 1. * (a) Construct a graph of the magnitude of the...Ch. 18 - * A uranium nucleus has 92 protons. (a) Determine...Ch. 18 - 3. The electron and the proton in a hydrogen atom...Ch. 18 - * Use the superposition principle to draw E field...Ch. 18 - 5. * Use the superposition principle to draw ...Ch. 18 - * E field lines for a field created by an...Ch. 18 - 7. * Two objects with charges C are 50 cm from...Ch. 18 - 8. * charged object is 6.0 cm along a horizontal...Ch. 18 - 9. ** charged object is 4.0 cm along a horizontal...Ch. 18 - 10. **A distance d separates two objects, each...Ch. 18 - 11. * A point-like charged object with a charge +...Ch. 18 - 12. * A 3.0-g aluminum foil ball with a charge of ...Ch. 18 - 13. ** (a) If the string in the previous problem...Ch. 18 - * EST Using Earths E field for flight Earth has an...Ch. 18 - * An electron moving with a speed v0 enters a...Ch. 18 - 10-9 C hangs freely from a 1.0-m-long thread. What...Ch. 18 - 17. A 0.50-g oil droplet with charge is in a...Ch. 18 - 19. * Equation Jeopardy 1 The equations below...Ch. 18 - * Equation Jeopardy 2 The equations below describe...Ch. 18 - 21. During a lightning flash. of charge moves...Ch. 18 - 22. * (a) Construct a graph of the V field created...Ch. 18 - * A horizontal distance d separates two objects...Ch. 18 - * Two objects with charges qand+q are separated by...Ch. 18 - * Four objects with the same charge q are placed...Ch. 18 - 26. Spark jumps to nose An electric spark jumps...Ch. 18 - 27. * Two charged point-like objects are...Ch. 18 - BIO Electric field in body cell The electric...Ch. 18 - * Equation Jeopardy 3 The equation below describes...Ch. 18 - 31. * Equation Jeopardy 4 The equation below...Ch. 18 - 32. * While a sphere with positive charge remains...Ch. 18 - 33. * Figure P18.33 shows field lines in a region...Ch. 18 - 34. * A metal sphere has no charge on it. A...Ch. 18 - 35. ** EST A Van de Graaff generator of radius...Ch. 18 - ** A metal ball of radius R1 has a charge Q. Later...Ch. 18 - 37. * Positively charged metal sphere A is placed...Ch. 18 - *Two small metal spheres A and B have different...Ch. 18 - 39. * An electric dipole such as a water molecule...Ch. 18 - 10-7C at its head and an equal magnitude negative...Ch. 18 - 41. BIO Body cell membrane electric field (a)...Ch. 18 - 42. ** Earth's electric field Earth has an...Ch. 18 - 43. You have a parallel plate capacitor. (a)...Ch. 18 - 44. * A capacitor of capacitance C with a vacuum...Ch. 18 - 45. * A capacitor of capacitance C with a vacuum...Ch. 18 - How does the capacitance of a parallel plate...Ch. 18 - BIO EST Axon capacitance The long thin cylindrical...Ch. 18 - 48. ** Sphere capacitance A metal sphere of radius...Ch. 18 - * BIO EST Capacitance of red blood cell Assume...Ch. 18 - BIO Defibrillator During ventricular fibrillation...Ch. 18 - * EST The dielectric strength of air is 3106V/m....Ch. 18 - * Charged cloud causes electric field on Earth The...Ch. 18 - *BIO Hearts dipole charge The heart has a dipole...Ch. 18 - 55. * In a hot water heater, water warms when...Ch. 18 - 56. ** EST Lightning warms water A lightning flash...Ch. 18 - 57 * Four charged particles A, B, C, and D are...Ch. 18 - 59. ** A small object of unknown mass and charge...Ch. 18 - 61. * BIO Electrophoresis Electrophoresis is used...Ch. 18 - 62. * BIO Energy stored in axon electric field An...Ch. 18 - BIO Electric discharge by eels In several aquatic...Ch. 18 - BIO Electric discharge by eels In several aquatic...Ch. 18 - BIO Electric discharge by eels In several aquatic...Ch. 18 - BIO Electric discharge by eels In several aquatic...Ch. 18 - BIO Electric discharge by eels In several aquatic...Ch. 18 - BIO Electric discharge by eels In several aquatic...Ch. 18 - Electrostatic precipitator (esp) Electrostatic...Ch. 18 - Electrostatic precipitator (esp) Electrostatic...Ch. 18 - Electrostatic precipitator (esp) Electrostatic...Ch. 18 - Electrostatic precipitator (esp) Electrostatic...Ch. 18 - Electrostatic precipitator (esp) Electrostatic...
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- A uniformly charged insulating rod of length 14.0 cm is bent into the shape of a semicircle as shown in Figure P 19.21. The rod has a total charge of 7.50 C. Find (a) the magnitude and (b) the direction of the electric field at O, the center of the semicircle.arrow_forwardGive a plausible argument as to why the electric field outside an infinite charged sheet is constant.arrow_forwardIs it possible for a conducting sphere of radius 0.10 m to hold a charge of 4.0 C in air? The minimum field required to break down air and turn it into a conductor is 3.0 106 N/C.arrow_forward
- Three identical conducting spheres are fixed along a single line. The middle sphere is equidistant from the other two so that the center-to-center distance between the middle sphere and either of the other two is 0.125 m. Initially, only the middle sphere is charged, with qmiddle = +35.6 nC. The middle sphere is later connected by a conducting wire to the sphere on the left. The wire is removed and then used to connect the middle sphere to the sphere on the right. The wire is again removed. a. C What is the charge on each sphere? b. C Which sphere experiences the greatest electrostatic force? c. N What is the magnitude of that force?arrow_forwardConsider the electric dipole shown in Figure P19.20. Show that the electric field at a distant point on the + x axis is Ex 4 keqa/x3.arrow_forwardAn infinite line of positive charge lies along the y axis, with charge density = 2.00 C/m. A dipole is placed with its center along the x axis at x = 25.0 cm. The dipole consists of two charges 10.0 C separated by 2.00 cm. The axis of the dipole makes an angle of 35.0 with the x axis, and the positive charge is farther from the line of charge than the negative charge. Find the net force exerted on the dipole.arrow_forward
- Three charged particles are located at the corners of an equilateral triangle as shown in Figure P19.9. Calculate the total electric force on the 7.00-C charge.arrow_forwardA sphere has a net charge of 8.05 nC, and a negatively charged rod has a charge of 6.03 nC. The sphere and rod undergo a process such that 5.00 109 electrons are transferred from the rod to the sphere. What are the charges of the sphere and the rod after this process?arrow_forwardA circular ring of charge with radius b has total charge q uniformly distributed around it. What is the magnitude of the electric field at the center of the ring? (a) 0 (b) keq/b2 (c) keq2/b2 (d) keq2/b (e) none of those answersarrow_forward
- (a) Find the electric field at the center of the triangular configuration of charges in Figure 18-54., given that qa=+ 2.50 nC, qb=-8.00 nC, and qc=+ 1.50 nC. (b) Is there any combination of charges, other than qa= qb=qc,that will produce a zero strength electric field at the center of the triangular configuration?arrow_forwardA small sphere of charge q = +68 C and mass m = 5.8 g is attached to a light string and placed in a uniform electric field E. that makes ail angle = 37 with the horizontal. The opposite end of the string is attached to a wall and the sphere is in static equilibrium when the string is horizontal as in Figure P15.22. (a) Construct a free body diagram for the sphere. Find (b) the magnitude of the electric field and (c) the tension in the string.arrow_forwardThree charges are situated at corners of a rectangle as in Figure P16.13. How much work must an external agent do to move the 8.00-C charge to infinity? Figure P16.13 Problems 13 and 14.arrow_forward
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