CHAPTER 3:Magnetism


Objectives

  • To get an idea about magnetic field and magnetic effect of electric current.
  • To understand Biot Savart's law and to find magnetic field due to an infinitevely long current carrying straight wire and a circular loop.
  • To understand Ampere's circuital law and its application to find magnetic field due to straight and toroidal solenoids.
  • To get an idea about force on moving charge in uniform electric field, and working of cyclotron.
  • To understand the construction and working of moving coil galvanometer and its conversion to ammeter and voltmeter.
  • To get an idea about how current loop act as a magnetic dipole, and to determined its moment and torque acting on a magnetic dipole in a uniform magnetic field.

3.1 Introduction


3.2 Biot-Savart's Law


3.3 Magnetic Field due to a straight current carrying conductor


3.4 Magnetic Field due to a circular coil


3.5 Ampere's Circuital Law


3.6 Applications of Ampere's Circuital Law


3.7 Lorentz Force


3.8 Cyclotron


3.9 Force Acting on a current carrying conductor


3.10 Rectangular coil in a Magnetic Field


3.11 Moving Coil Galvanometer


3.12 Conversion of Galvanometer into Ammeter


3.13 Conversion of Galvanometer into Voltmeter


3.14 Force acting between two parallel current carrying conductors


3.15 The Bar Magnet


3.16 The Magnetic Field Lines


3.17 The Dipole in a Uniform Magnetic Field


3.18 Magnetism and Gauss's Law


3.19 The Earth's Magnetism


3.20 Magnetisation and Magnetic Intensity

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