80 Electric Charges and Fields 10 The incorrect statement

Last updated: 6/14/2023

80 Electric Charges and Fields 10 The incorrect statement among the following statements is NCERT Pg 25 1 Electric field lines can never cross each other 2 Electrostatic field lines do not form any closed loop 3 In charge free region electric field lines can be taken to be continuous curve 4 Field lines around a system of two positive charges is straight and parallel lines pictorially 11 A dipole consist of two charges q and q separated by a distance 2a The electric field of this dipole at distance r from centre of dipole at a point A on axis is NCERT Pg 28 2p 1 2 4 8 3 2p 4 Z P 4 12 Electric field of 4 1m 3m components 1 E 100 x2 E E 0 Calculate net electric flux though the cube placed in electric field at shown position 2pr 4x r a 12 3 3 m 3 m x axis are NCERT Pg 35 1 900 Nm C 2 1800 Nm C 1 3 600 Nm C 1 4 3600 Nm C 1 13 An infinite long straight wire has linear charge density 4 x 105 C m The electric force experienced by a proton at perpendicular distance of 10 mm from axis of wire is NCERT Pg 37 2 1 68 x 10 N 1 1 25 10 N 4 1 15 x 10 N 3 2 8 x 10 N 14 Coulomb s law of electrostatic for the force between two point charges most closely resembles NCERT Pg 12 1 Law of conservation of charges 2 Law of conservation of energy 3 Newton s second law of motion 4 Newton s law of gravitation 15 A point charge q of mass m is placed in front of a uniformly charged infinite sheet and released The surface charge density of sheet is a C m2 The kinetic energy of charge after t second is NCERT Pg 39 1 99 3 4 m 9 0 1 83m 3 2 4 9 0 1 com 9 0 1 43m 17 16 An electric dipole consists of two equal and opposite charges 0 02 C separated by 2 mm The dipole is placed is uniform 18 NCERT Maps electric field of 107 N C 1 Maximum torque exerted by field on dipole is 2 4 x 10 Nm 1 2 10 Nm 3 8 x 10 Nm 4 2 x 10 6 Nm A thin spherical shell is given a charge q 4 C uniformly distributed over its surface Consider a point P outside the shell at distance of 2 m from surface If the radius of shell is 1 m what is electric field at point P INCERT Pg 39 1 4 kN C 1 3 9 kN C 1 2 2 kN C 1 4 36 kN C 1 Figure shows track of three positive charged particles through uniform electric field E All charges are equal in value Which charge particle has more initial kinetic energy on entering horizontally between the plate INCERT Pg 47 undation INCERT Pg 31 20 3 1 Particle 1 2 Particle 2 Plate Plate 3 Particle 3 4 Both 1 and 2 have equal initial KE Office Aakash Tower 8 Pusa Road New Delhi 110005 Ph 011 47623456