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Chapter 9 Exercises: Electrostatics môn Vật lý đại cương 2 | Học viện Công Nghệ Bưu Chính Viễn Thông

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An isolated metal sphere of radius r carries a charge +Q. The chargemay be assumed to be  concentrated at the center of the sphere . Tài liệu giúp bạn tham khảo, ôn tập và đạt kết quả cao. Mời đọc đón xem! 

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Homework. Chapter 9. Electrostatics Jan 2024
Pr1. (s02_qp_4 q5)
(a) Define potential at a point in an electric field.
..........................................................................................................................................
.........................................................................................................................................
(b) An isolated metal sphere of radius r carries a charge +Q. The charge may be assumed to be
concentrated at the center of the sphere.
(i) State, in terms of r and Q, the electric potential V at the surface of the sphere. Identify
any other symbols you use.
...................................................................................................................................
...................................................................................................................................
(ii) Write down the relationship between capacitance C, charge Q and potential V.
...................................................................................................................................
(iii) Hence show that the capacitance C of the sphere is given by C = 4πε r. 0
(c) The sphere in (b) has a radius of 15 cm and carries a charge of 2.0×10 C. Calculate –6
(i) the capacitance of the sphere,
(ii) the energy stored on the sphere
Pr. 2 (m13 qp41)
Pr. 3.
Pr. 4 (m14 qp41)
Pr. 5. (s15-43)
Pr. 6. (w15-41)

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Homework. Chapter 9. Electrostatics Jan 2024 Pr1. (s02_qp_4 q5)
(a) Define potential at a point in an electric field.
..........................................................................................................................................
.........................................................................................................................................
(b) An isolated metal sphere of radius r carries a charge +Q. The charge may be assumed to be
concentrated at the center of the sphere.
(i) State, in terms of r and Q, the electric potential V at the surface of the sphere. Identify any other symbols you use.
...................................................................................................................................
...................................................................................................................................
(ii) Write down the relationship between capacitance C, charge Q and potential V.
...................................................................................................................................
(iii) Hence show that the capacitance C of the sphere is given by C = 4πε0r.
(c) The sphere in (b) has a radius of 15 cm and carries a charge of 2.0×10–6C. Calculate
(i) the capacitance of the sphere,
(ii) the energy stored on the sphere Pr. 2 (m13 qp41) Pr. 3. Pr. 4 (m14 qp41) Pr. 5. (s15-43) Pr. 6. (w15-41)

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