21_InstSolManual_PDF_Part7

21_InstSolManual_PDF_Part7 - 21.21. Set Up: The bar and...

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 21.21. Set Up: The bar and magnetic field are shown in Figure 21.21. To determine which end is at higher potential consider the direction of the magnetic force on a positive charge in the moving rod. Accumulation of positive charge produces higher potential. Figure 21.21 Solve: (a) (b) The magnetic force on a positive charge in the bar is eastward. Positive charge accumulates at end a of the bar and that end (the east end) is at higher potential. (c) If the bar is moving east to west the force is to the north. The force is perpendicular to the bar and there is no charge accumulation at its ends; the potential difference between its ends is zero. Reflect: If the bar moves parallel to the magnetic field there is no magnetic force and no potential difference is produced. 21.22. Set Up: The rod moves perpendicular to the magnetic field, so Eq. (21.6) applies. To determine which end is at higher potential, consider the direction of the magnetic force on a positive charge in the moving rod. The endis at higher potential, consider the direction of the magnetic force on a positive charge in the moving rod....
View Full Document

Ask a homework question - tutors are online