Report

Chapter 7 Magnetostatic Field Lecture by Qiliang Li §7.1 Introduction Ampere’s manuscript Ampere’s experiment analogy between electric and magnetic fields §7.2 Biot-Savart’s Law §7.2 Biot-Savart’s Law • = = • K is surface current density • J is the (volume) current density What happens when it is an infinite long line? §7.2 Biot-Savart’s Law Example 7.1 The conducting triangular loop in Fig. 7.6(a) carries a current of 10 A. Find H at (0,0,5) due to side 1 of the loop. Solve: α1 = 90o , cosα2= 2/sqt(ρ2+22) =2/ 29 What is the direction? §7.2 Biot-Savart’s Law Example 7.2 Find H at (-3, 4, 0) due to the current filament shown in Fig. 7.7(a). Solve: find the angles: α1 and α2 , determine aφ = + §7.2 Biot-Savart’s Law Example 7.3 A circular loop located on 2 + 2 = 9, z=0 carries a direct current of 10 A along . Determine H at (0,0,4) and (0,0,-4)