Q 54

Q 54 51. 52. 53. 55. 56. 57. 58. 59- A point charge Q is placed at pornt w difference VA - VB positive, negative, or zero, if Q is (i) positive (ii) negative? diagram of que no. 1 delhi 2011 Two uniformly large parallel thin plates having charge densities and —s are kept in the X-Z plane at a distance 'd' apart. Sketch an equipotential surface due to electric field between the plates. If a particle of mass m and charge '—q' remains station between the lates, what is the ma itude and direction of this field? Two small identical electrical dipoles AB and CD, each of dipole moment 'p' are kept at an angle of 1200 as shown in the figure. What is the resultant dipole moment of i this combination? If this system is subjected to electric field ( ) r E directed along + X direction, what will be the magnitude and direction of the torque acting on this? diagram Of que no. 9 delhi 2011 Figure shows two identical capacitors, Cl and C2, each of I mF capacitance connected to a battery of 6 V. Initially switch 'S' is closed. After sometimes 'S' is left open and dielectric slabs of dielectric constant K — 3 are inserted to fill completely the space between the plates Of the two capacitors. How will the (i) charge and (ii) potential difference between the plates of the capacitors be affected after the slabs are inserted? dagram of que no. 11 delhi 2011 Using Gauss's law obtain the expression for the electric field due to a uniformly charged thin spherical shell of radius R at a point outside the shell. Draw a graph showin the variation of electric field with r, for r > R and r < R. A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is I O V. What is the tential at the centre of the here? A thin straight infinitely long conducting wire having charge density I is enclosed by a cylindrical surface of radius r and length l, its axis coinciding with the length Of ession for the electric flux throu the surface Of the linder• the wire. Find the Plot a graph showing the variation Of coulomb force (F) versus (1 /rA2), where r is the distance between the two charges of each pair Of Charges: (1 mC, 2 mC) and (2 mc — 3 mc . Int ret the a hs obtained. Net capacitance of three identical capacitors in series is 1 rnF. What will be their net capacitance if connected in parallel? Find the ratio of enerW stored in the two configurations if they are both connected to the same source. Two insulated charged copper spheres A and B if identical size have charges qA and I qB A third sphere C of the same size but uncharged is brought in contact with the first and then in contact with the second and finally removed 67. 68. 69. 70. 71. 72. 73. rotatipgg A capac•t along Wit process c resulting inside th Deduce t capacitm electric fi dielectric Why is u the same What is char ? A capac charge s V, the cl- (i) The What increase A hollow a three the regic E=50xi (i) Net nt diegyam While tl thunder: thunder: asked dropped parents. safety of Answer sit insiü (b) Whid (c) Whicl d Give,