Directions: Write the letter of the correct answer.1. The electric field acts between two parallel plates. Which of the followingstatements is not correct?A. E is inversely proportional to distance.B. The field is uniform.C. A charge would experience a force VdQ.D. Field lines are at right angles to the plates.2. Which of the following statements concerning the work done when a smallcharge is moved in the field is incorrect?A. When it is moved from either P to Q or S to R, thework done is the same in each case.B. When it is moved from O to R no work is done.*RC. When it is moved around the path PQRS, theoverall work done is zero.D. When it is moved around the path PQRS, theoverall work done is equal to twice the work donein moving from P to Q.3. An equipotential surface that surrounds a + 5.0 µC point charge has aradius of 5.0 cm. What is the potential of this surface?A. 9.0 x 103 VB. 9.0 x 104 VC. 9.0 x 105 VD. 9.0 x 106 V4. The electric potential inside a parallel-plate capacitorA. is constant.B. increases linearly from the negative to the positive plate.C. decreases linearly from the negative to the positive plate.D. decreases inversely with distance from the negative plate.5. Initially a charged capacitor stores 2000 HJ energy. When the potentialdifference decreases by 3.0 V, the energy stored by it becomes 600 µJ. Whatis the capacitance of this capacitor?A. 94 µFВ. 156 иFС. 187 uFD. 243 Mf

When we apply a potential difference between the two plates electric field forms between the two…

1. The electric field acts between two parallel plates. Which of the following statements is not correct? A. E is inversely proportional to distance. B. The field is uniform. C. A charge would experience a force VdQ. D. Field lines are at right angles to the plates. uhon a small

1. The electric field acts between two parallel plates. Which of the following statements is not correct? A. E is inversely proportional to distance. B. The field is uniform. C. A charge would experience a force VdQ. D. Field lines are at right angles to the plates. uhon a small

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter19: Electric Forces And Electric Fields

Section: Chapter Questions

Problem 62P

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Integrated Concepts An electron has an initial velocity of 5.00106m/s in a uniform 2.00105N/C strength electric field. the field accelerates the electron in the direction opposite to its initial velocity. (a) What is the direction of the electric field? (b) How far does the electron travel before coming to rest? (c) How long does it take the electron to come to rest? (d) What is the electron’s velocity when it returns to its starting point?
Unreasonable Results 64. (a) Calculate the electric field strength near a 10.0 cm diameter conducting sphere that has 1.00 C of excess charge on it. (b) What is unreasonable about this result? (c) Which assumptions are responsible?
A person is placed in a large, hollow, metallic sphere that is insulated from ground, (a) If a large charge is placed on the sphere, will the person be harmed upon touching the inside of the sphere? (b) Explain what will happen if the person also has an initial charge whose sign is opposite that of the charge on the sphere.
This afternoon, you have a physics symposium class, and you are the presenter. You will be presenting a topic to physics majors and faculty. You have been so busy that you have not had time to prepare and you dont even have an idea for a topic. You are frantically reading your physics textbook looking for an idea. In your reading, you have learned that the Earth carries a charge on its surface of about 105 C, which results in electric fields in the atmosphere. This gets you very excited about a new theory. Suppose the Moon also carries a charge on the order of 105 C, with the opposite sign! Maybe the orbit of the Moon around the Earth is due to electrical attraction between the Moon and the Earth! Theres an idea for your symposium presentation! You quickly jot down a few notes and run off to your symposium. While you are speaking, you notice one of the professors doing some calculations on a scrap of paper. Uh-oh! He has just raised his hand with a question. Why are you embarrassed?
(a) By what factor must you change the distance between two point charges to change the force between them by a factor of 10? (b) Explain how the distance can either increase or decrease by this factor and still cause a factor of 10 change in the force
Figure 18.44 shows an electric field extending over three regions, labeled I, II, and III. Answer the fallowing questions, (a) Are there any isolated charges? If so, in what region and what are their signs? (b) Where is the field strongest? (c) Where is it weakest? (d) Where is the field the most uniform?
Point charges of 25.0 C and 45.0 (2 are placed 0.500 m apart. (a) At what point along the line between them is the electric field zero? (b) What is the electric field halfway between them?
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. (a) What is the magnitude and sign of the excess charge, noting the electric field of a conducting sphere is equivalent to a point charge at its center? (b) What acceleration will the field produce on a free electron near Earth’s surface? (c) What mass object with a single extra electron will have its weight supported by this field?
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(a) How strong is the attractive force between a glass rod with a 0.700 C charge and a silk cloth with a 0.600 C charge, which are 12.0 cm apart, using the approximation that they act like point charges? (b) Discuss how the answer to this problem might be affected if the charges are distributed over some area and do not act like point charges.
Figure 18.47 shows the electric field lines near two charges q j and g2. What is the ratio of their magnitudes? (b) Sketch the electric field lines a long distance from the charges shown in the figure.
Compare and contrast the Coulomb force field and the electric field. To do this, make a list of five properties for the Coulomb force field analogous to the five properties listed for electric field lines. Compare each item in your list of Coulomb force field properties with those of the electric field—are they the same or different? (For example, electric field lines cannot cross. Is the same true for Coulomb field lines?)