953_Physics ProblemsTechnical Physics

# 953_Physics ProblemsTechnical Physics - 294 Electromagnetic...

This preview shows page 1. Sign up to view the full content.

294 Electromagnetic Waves SOLUTIONS TO PROBLEMS Section 34.1 Maxwell’s Equations and Hertz’s Discoveries *P34.1 (a) The rod creates the same electric field that it would if stationary. We apply Gauss’s law to a cylinder of radius r = 20 cm and length A : EA ⋅= °= z d q Er l l inside 0 0 20 π λ bg cos FIG. P34.1 Ej j = = ×⋅ × 2 35 10 2 8 85 10 0 2 315 10 0 9 12 3 r radially outward ±Cm±Nm C m NC 2 2 ej a f .. ± . ± . (b) The charge in motion constitutes a current of 35 10 15 10 0 525 96 ×× = Cm ms A e j . . This current creates a magnetic field. B = µ 0 2 I r = 41 0 0 5 2 5 2 525 10 7 7 TmA A m T a f af . . ± . ± kk (c) The Lorentz force on the electron is Fq q =+× EvB F F =− × × +− × × × × F H G I K J −+× += × −− 1 6 10 3 15 10 1 6 10 240 10 5 25 10 5 04 10 2 02 10 4 83 10 19 3 19 6 7 16 17 16 ± . ± . ± . ± . ± . ± N C C m s Ns N N N e j e j ji k jj j Section 34.2 Plane Electromagnetic Waves P34.2 (a) Since the light from this star travels at
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Ask a homework question - tutors are online