Tiêu đề 17. Electrostatic Potential and Capacitance .pdf ✅

17 >c\ko`m ELECTROSTATIC POTENTIAL AND CAPACITANCE Trend Analysis of NEET and AIIMS (Year 2010-2018) Year + , - . / 0 -+,+ -+,, -+,- -+,. -+,/ -+,0 -+,1 -+,2 -+,3
EduHulk ELECTROSTATIC POTENTIAL AND CAPACITANCE 122696 PHYSICS PHYSICS 233
234 PHYSICS Topic 1: Electrostatic Potential and Equipotential Surfaces 1. The electric potential inside a conducting sphere (a) increases from centre to surface (b) decreases from centre to surface (c) remains constant from centre to surface (d) is zero at every point inside 2. It becomes possible to define potential at a point in an electric field because electric field (a) is a conservative field (b) is a non-conservative field (c) is a vector field (d) obeys principle of superposition 3. Which of the following about potential at a point due to a given point charge is true ? The potential at a point P due to a given point charge (a) is a function of distance from the point charge. (b) varies inversely as the square of distance from the point charge. (c) is a vector quantity. (d) is directly proportional to the square of distance from the point charge. 4. Which of the following quantities do not depend on the choice of zero potential or zero potential energy? (a) Potential at a point (b) Potential difference between two points (c) Potential energy of a two-charge system (d) None of these 5. A cube of a metal is given a positive charge Q. For this system, which of the following statements is true? (a) Electric potential at the surface of the cube is zero (b) Electric potential within the cube is zero (c) Electric field is normal to the surface of the cube (d) Electric field varies within the cube 6. A unit charge moves on an equipotential surface from a point A to point B, then (a) VA – VB = + ve (b) VA – VB = 0 (c) VA – VB = – ve (d) it is stationary 7. The electric potential at a point on the equatorial line of an electric dipole is (a) directly proportional to distance (b) inversely proportional to distance (c) inversely proportional to square of the distance (d) None of these 8. Match the Column I and Column II. Column-I Column -II (A) Electric potential near (1) Negative an isolated positive charge (B) Electric potential near (2) Positive an isolated negative charge (C) Electric potential due (3) Varies inversly to a charge at its own of radius location is not defined (D) Electric potential due (4) Infinite to uniformly charged solid non-conducting sphere (a) (A) ® (2); (B) ® (1); (C) ® (4); (D) ® (3) (b) (A) ® (1); (B) ® (3); (C) ® (4); (D) ® (2) (c) (A) ® (4); (B) ® (1); (C) ® (3); (D) ® (4) (d) (A) ® (3); (B) ® (2); (C) ® (1); (D) ® (4) 9. Figure below shows a hollow conducting body placed in an electric field. Which of the quantities are zero inside the body? (a) Electric field and potential (b) Electric field and charge density (c) Electric potential and charge density. (d) Electric field, potential and charge density. 10. The value of electric potential at any point due to any electric dipole is (a) 2 . ́ ur r p r k r (b) 3 . ́ ur r p r k r (c) 2 . . ur r p r k r (d) 3 . . ur r p r k r 11. A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at a distance of 2 cm from the centre of the sphere is (a) zero (b) 10 V (c) 4 V (d) 10/3 V 12. In moving from A to B along an electric field line, the work done by the electric field on an electron is 6.4 × 10–19 J. If f1 and f2 are equipotential surfaces, then the potential difference VC – VA is A B C E f1 f2 (a) –4 V (b) 4 V (c) zero (d) 6.4 V 13. A non-conducting ring of radius 0.5 m carries a total charge of 1.11× 10–10 C distributed non-uniformly on its circumference producing an electric field E everywhere in space. The value of the integral 0 E d. = =¥ - ò l l l ( l = 0 being center of the ring) in volts is (a) +2 (b) –1 (c) –2 (d) zero Exercise 1 : Topic-wise MCQs EduHulk 122696 PHYSICS PHYSICS EBD_7418